10. 
    Frequency
    The number of waves passing a point in a given time, usually 1 second. Frequency is measured in hertz and is equal to the speed of the wave divided by their wavelength. Longer wavelengths have lower frequency and vice-versa.
    Found op http://www.delscope.demon.co.uk/astronomy/glossary.htm
    
    
11. 
    Frequency
    the average number of times that a member of the target audience will have been exposed to an advertisement during a specified period.
    Found op http://wps.pearsoned.co.uk/wps/media/objects/1452/1487687/glossary/glossary
    
    
12. 
    Frequency
    The number of complete cycles of an electromagnetic wave in a second. Unit: Hertz, symbol: Hz. 1 Hz = 1 cycle per second.
    Found op http://www.encyclo.co.uk/local/20474
    
    
13. 
    frequency
    in sound: how high or low a musical note is. This is directly analogous to colour in the visual realm, where different colours are due to their frequency value in the electromagnetic spectrum
    Found op http://www.animationpost.co.uk/doping/glossary.htm
    
    
14. 
    Frequency
    The rate of vibration of an electrical or mechanical oscillation. Measured by the number of complete cycles executed in 1 second. In audio terminology, frequency range is considered to be from 20 cycles per second, or 20 Hertz (Hz), up to 20,000 cycles per second, or 20 kilohertz.
    Found op http://www.encyclo.co.uk/local/20523
    
    
15. 
    Frequency
    The rate per second at which an oscillating body vibrates. Usually measured in Hertz (Hz), humans can hear sounds with frequencies in the range of 20 Hz to 20 kHz
    Found op http://www.musiconmypc.co.uk/art_glossary.php
    
    
16. 
    Frequency
    The time period between successive issues of a publication such as weekly, monthly or quarterly
    Found op http://www.aweaver.co.uk/useful/glossary.html
    
    
17. 
    Frequency
    the rate per second at which an oscillating body vibrates. Usually measured in Hertz (Hz), humans can hear sounds whose frequencies are in the range 20 Hz to 20kHz. In audio, the number of repeating cycles of change in air pressure or oscillations in voltage, that occur in one unit of time usually a...
    Found op http://www.traditionalmusic.co.uk/music%20tech%20glossary/Music%20Tech%20Gl
    
    
18. 
    Frequency
    – The amount of times that a wave repeats per second, measured in Hertz (which are cycles per second) after Heinrich R. Hertz the man who devised this form of measurement. Or to put it another way, if a soundwave vibrates the air x amount of times a second, this could be said to be it's frequ...
    Found op http://www.traditionalmusic.co.uk/music%20tech%20glossary/Music%20Tech%20Gl
    
    
19. 
    Frequency
    the number of cycles per second, which determines pitch (measured in Hertz, Hz)
    Found op http://www.guitartools.co.uk/guitar_and_music_glossary.html
    
    
20. 
    Frequency
    The average number of times that members of a target audience who have been counted at least once as viewers to a schedule of advertising spots (or sequence of programmes), have counted as viewers.
    Found op http://www.agbnielsen.net/glossary/glossaryQ.asp?type=alpha&jump=none
    
    
21. 
    Frequency
    The number of complete cycles of an electromagnetic wave in one second. The unit is the Hertz, symbol Hz. Frequency used to be simply called cycles per second. High frequencies are also usually given a prefix, ie: 1000Hz = 1KiloHertz (1KHz) 1000000Hz = 1MegaHertz (1MHz) 1000000000Hz = 1GigaHertz (...
    Found op http://www.em-surveys.co.uk/Definitions%201.html
    
    
22. 
    Frequency
    Frequency is the average number of times your target audience is exposed to your message. People consume more than one type of media so frequency calculations take this into account. For example, someone may read the Financial Times and Marie Claire and also watch television. ‘This many people...
    Found op http://www.paperclippartnership.co.uk/public-relations-definitions.html
    
    

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