In music terms, crotchet equals 92 means that a crotchet (also known as a quarter note) has a duration of 92 beats per minute.
In other words, if a crotchet has a value of 92 bpm, it would take 92 seconds to play 60 crotchets. Alternatively, it would take 1 second to play 92 / 60 = approximately 1.53 crotchets.