Following options are possible with GREP functions (e.g. TGREP, SLOG):

  -q  quick (simple string compare instead of regular expression)
  -i  ignore case sensitive (default set, use "-i-" for not ignore)
  -v  match invert
  -r  show pattern
  -n  show line number
  -c  only count lines
  -x  don't show line number

"-x" can only be used in combination with "-c", while "-c" is made
recessionary (lines are counted, but result isn't shown).