You know what it looks like… but what is it called?
TAKE THE QUIZ“timeon”
The following 2 entries include the term timeon.
time on target
: a concentration of artillery fire on a target in which the time of firing by each unit participating is so regulated that all the projectiles reach the target simultaneously
time on one's hands
idiom: time when one is not busy
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Merriam-Webster unabridged