\version "2.16.1"
\relative c' {
  \time 9/4 \set Score.skipBars = ##t R1*9/4*2 
  \once \override Staff.MultiMeasureRest #'usable-duration-logs = #'(0) \set Score.skipBars = ##t R1*9/4*2
}
\relative c' {
  \time 7/4 \set Score.skipBars = ##t R1*7/4*2 
}