Did you know that a moment is a medieval unit of time equal to 1.5 minutes or 1/40 of an hour. In modern English it usually refers to “a short period of time”, the exact length remaining ambiguous. The reference is from John of Trevisa, writing in 1398 that there are 40 moments in an hour (thus the 90 seconds). However, this definition is from an archaic version of the Oxford English Dictionary and is not in current usage today. So it would be more accurate to say that while a medieval moment was ninety seconds, modern moments are much shorter.