in which case each long rest should fill three spaces.
\score {
\relative c'' {
\set Score.timing = ##f
\set Score.defaultBarType = "empty"
\override NoteHead #'style = #'neomensural
\override Staff.TimeSignature #'style = #'neomensural
\clef "petrucci-g"
g1. g2 \[ a\breve g\breve c\breve b\longa \]
g1. g2 \[ a\breve g\breve d'\breve c\longa \]
\break
g1. g2 \[ g'\breve e\breve c\breve b\breve a\longa.\]
r\maxima
f'1. f2 \[ e\breve c\breve d\breve c\maxima \]
}
\layout {
\context {
\Voice
\remove Ligature_bracket_engraver
\consists Mensural_ligature_engraver
}
}
}