“occasion”

At what time? At which time? Upon which occasion or circumstance? Used to introduce direct or indirect questions about time.

Belonging to, from, of, or relating to, them (plural).

At no time; on no occasion; in no circumstance.

The act of using.

At all times; throughout all time; since the beginning.

Frequently; many times on different occasions.

An occasion on which something, such as a song or show, is played.

Any one (of two).

On some occasions, over some periods, or in certain circumstances, but not always.

To transport toward somebody/somewhere.

An occasion when a performer or team of them (especially in vaudeville) expects to perform at a theater for a single evening.