avenue vs staircase

avenue

noun
  • The principal walk or approach to a house which is withdrawn from the road, especially, such approach bordered on each side by trees; any broad passageway thus bordered. 

  • A method or means by which something may be accomplished. 

  • A broad street, especially one bordered by trees or, in cities laid out in a grid pattern, one that is on a particular side of the city or that runs in a particular direction. 

  • A way or opening for entrance into a place; a passage by which a place may be reached; a way of approach or of exit. 

staircase

noun
  • A connected set of flights of stairs; a stairwell. 

  • A flight of stairs; a stairway. 

  • A set of locks (enclosed sections of waterway) mounted one above the next. 

verb
  • To modify (a signal, a graph, etc.) to reduce a smooth curve to a series of discrete steps. 

  • To increase one's share in a co-ownership. 

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