Going a bit further with this, is it possible to create a "triple hit", ala the bit in Van Morrison's Moondance that goes:
"... shine" /// "in your blush" ///
I don't know the piece, but assuming the hits aren't triplets, yes you can...using the methods listed above. If the lyric is one beat followed by three "hits" (in BIAB parlance, "shots") with X being the chord name:
X.. , X.. -- X.. , X.. would get you one bar with four "shots". Typing the comma will put the second command on the second or fourth beat.
If you want nothing to play on the first beat:
X. , X.. -- X.. , X.. would get you silence on the first beat followed by three "shots". Typing the comma will put the second command on the second or fourth beat.
If those shots are syncopated, that's another kettle and would require "pushes". What I outlined are four quarter beats. If they are triplets, then things are considerably more complicated.