Frequency - Word Form
  2 objects
  5 observation
  5 observed
  1 obstruct
  2 obtain
  1 occupied
  4 occupy
 10 occur
  2 occurrence
  1 occurring
 17 occurs
  1 ocular
  1 oesophagus
409 of
  3 off
  1 office
  1 offices
  1 often
 10 old
  1 older
 52 on
  5 once
 30 one
  1 ones
  9 only
  2 open
  1 opening
  4 operations
  2 opposed
  1 opposing
  8 opposite
  2 opposites
  1 opposition
 44 or
 13 order
 29 organ
 13 organs
  2 origin
  1 original
  1 originate
  2 originating
 36 other
 22 others
  1 otherwise
  6 our
 38 out
  5 outer
  1 outmost
  1 outside
  3 outward
  5 outwards
  3 over
  3 oviparous
 21 owing
  1 own
  1 oysters