kneeler vs ottoman

kneeler

noun
  • 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 

  • A person who kneels. 

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

  • A hassock. 

ottoman

noun
  • A low stool or thick cushion used to rest the feet or as a seat. 

  • An upholstered sofa, without arms or a back, sometimes with a compartment for storing linen etc. 

  • A fabric with a pronounced ribbed or corded effect, often made of silk or a mixture of cotton and silk-like yarns. 

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