kneeler vs pillion

kneeler

noun
  • A hassock. 

  • A person who kneels. 

  • On a gable-end, the stone (often decorated) at the base of the slope of the gable on either side. 

  • An apparatus that permits the loading door of a bus to decrease in height in order to facilitate boarding of passengers that are seniors and physically disadvantaged 

pillion

noun
  • The cushion of a saddle. 

  • The person riding in the pillion. 

  • A similar second saddle on a motorcycle for a passenger. 

  • A pad behind the saddle of a horse for a second rider. 

verb
  • To ride on a pillion. 

  • To put a pillion on a horse. 

adv
  • Riding behind the driving rider, as when positioned on the rump of a mount. 

How often have the words kneeler and pillion occurred in a corpus of books? (source: Google Ngram Viewer )