\new Staff \relative c'' {
  \key es \major
  \time 3/4
  % this bar contains no \breathe
  << { g4 as g } \\ { es4 bes es } >> |
  % Modern notation:
  % by default, \breathe uses the rcomma, just as if saying:
  % \override BreathingSign.text = #(make-musicglyph-markup "scripts.rcomma")
  << { g4 as g } \\ { es4 \breathe bes es } >> |
  
  % rvarcomma and lvarcomma are variations of the default rcomma and lcomma
  % N.B.: must use Staff context here, since we start a Voice below
  \override Staff.BreathingSign.text =
    \markup { \musicglyph "scripts.rvarcomma" }
  << { g4 as g } \\ { es4 \breathe bes es } >> |
  
  % vee
  \override BreathingSign.text = \markup { \musicglyph "scripts.upbow" }
  es8[ d es f g] \breathe f |
  
  % caesura
  \override BreathingSign.text =
    \markup { \musicglyph "scripts.caesura.curved" }
  es8[ d] \breathe es[ f g f] |
  es2 r4 \bar "||"
}