Riden or Ridden: How To spell?
The word Riden is misspelled against Ridden, which is past perfect of "Ride."
Ridden has double "dd" is mispronounced as "d"Remember double 'DD' in between the strings Ri & en which should not be misspelled with single 'D'
Wrong Spelling:  Ri-d-en  Correct Spelling:  Ri-dd-en 
Find more wrongly spelled words of Ridden to spell it well.