afro vs flattop

afro

noun
  • hairstyle characterized by tightly curled locks and a rounded shape. 

  • A person of African ancestry 

flattop

noun
  • A short haircut in which the hair is brushed straight up then cut flat across the top. 

  • An aircraft carrier. 

  • A type of stringed instrument, most often an acoustic guitar, with a flat top (as opposed to an archtop), with strings held in place with pins, and with a complex system of bracing struts on the top. 

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