1) Accessibility 2) Availability 3) Convenience 4) Handiness 1) Accessibility 2) Availability 3) Handiness 
• (n.) Quality of being available; capability of being used for the purpose intended. • (n.) Competent power; validity; efficacy; as, the availableness of a title.
A·vail'a·ble·ness noun 1. Competent power; validity; efficacy; as, the availableness of a title. [ Obsolete] 2. Quality of being available; capability of being used for the purpose intended. Sir M. Hale.