rooster vs weathercock

rooster

noun
  • A powerful, prideful, or pompous person. 

  • A male domestic chicken (Gallus gallus domesticus) or other gallinaceous bird. 

  • A wild violet, when used in a children's game based on cockfighting. 

  • A bird or bat which roosts or is roosting. 

  • A man. 

weathercock

noun
  • One who veers with every change of current opinion; a fickle, inconstant person. 

  • A weather vane, sometimes in the form of a cockerel. 

  • A kind of wind pump whose top behaves like a weather vane, moving with the wind direction, but which also has a wheel attached to measure wind speed. 

verb
  • To act as a weathercock for. 

  • To turn upwind because of the difference in water pressure on two sides. 

  • To veer into the direction of the oncoming (relative) wind. 

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