What is the best way to notate crashes for drum kit, that happen only occasionally, while the rest of the rhythm pattern remains unchanged? Or only at the beginning of a section, but with the rest of the pattern continuing without the crash? Each of the examples below should ask the drummer to play the same thing. I would usually use the first notation, as it is less "busy" looking, and assume that the drummer knows only to crash on the first of the second group of repeated bars (i.e. bar 3). The second example is most accurate, but seems unnecessary. Is the third example correct at all?!
EDIT: from experience, it seems like the more accurate example (ex.2) is usually used in transcriptions, but I wondered what drummers prefer in actual drum charts.