It is CUSTOMARY to kneel
when surrendering to a king.
Game of Thrones Season 4, Episode 10
...in order to indulge in your CUSTOMARY
preemptive pre-show urination.
The Big Bang Theory Season 3, Episode 5
I know it's CUSTOMARY
for the birthday boy to receive presents,
The Big Bang Theory Season 9, Episode 17
It was CUSTOMARY for me
to extend him an invitation.
Game of Thrones Season 2, Episode 5
it has been CUSTOMARY for our ruler
to make the rounds of the lower pits
Game of Thrones Season 5, Episode 7