convēnˈience noun

1. Suitability
2. An advantage
3. Any means or device for promoting (esp domestic) ease or comfort
4. A lavatory or water closet, esp (public convenience) a building containing several for use by the public

convēnˈiency noun (rare)

Convenience

convēnˈiently adverb

convenience food noun

Food (partly) prepared before sale so as to be ready, or almost ready, for the table

convenience store noun (N American)

A small grocery shop, often part of a chain, that stays open after normal hours and is conveniently situated in a local area

at one's (earliest) convenience

(on the first occasion or at the earliest time) when it is suitable or opportune