sashay vs stairway

sashay

noun
  • A sequence of sideways steps in a circle in square dancing. 

  • A chassé. 

verb
  • To move sideways. 

  • To walk casually, showily or in a flirty manner; to strut, swagger or flounce. 

  • To chassé when dancing. 

stairway

noun
  • A set of steps, with or without a case, that allow one to walk up or down. 

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