Frequency - Word Form
   1 obedient
   2 obey
   2 obeys
   4 object
   1 objection
   1 objects
   3 observe
   1 observed
   3 observer
   1 observers
   1 obstacles
   5 obtain
   4 obtained
   1 occasion
   1 occupied
   1 occur
   1 occurrence
   1 occurs
   2 ocean
 709 of
   2 off
   2 offers
   2 often
   1 oil
   3 older
  56 on
   9 once
  44 one
   1 one-fifth
   1 one-pound
   1 one-sixth
   1 one-third
  30 only
   1 opening
   1 opens
   2 operation
   1 operations
   1 opportunity
   2 oppose
   1 opposite
   1 opposition
   1 optics
  49 or
   5 order
   1 orders
   2 ordinary
   1 organic
   1 organs
   3 origin
   3 original
   2 originally
   1 originated
   1 originates
   1 oscillate
   1 oscillation
   2 oscillations
  40 other
   4 others
   2 otherwise
  26 our
   7 out
   1 outside
   8 over
   9 overcome
   1 overcoming
   1 overflows
   2 overshot
   8 own
   1 oxide
   1 oxidising
  25 oxygen