usability

About 1.24 uses per million words.

Meaning

1. noun The state or condition of being usable.
2. noun The degree to which an object, device, software application, etc. is easy to use with no specific training.

Similar words

utility usefulness availability operability user-friendliness use utilization operationalization functionality convenience

Often followed by

of testing and engineering problems evaluation test is tests

Word family

usabilities