toupee vs weft

toupee

noun
  • A wig of false hair worn to cover a bald spot, especially as worn by a man. 

weft

noun
  • A hair extension that is glued directly to a person′s natural hair. 

  • The horizontal threads that are interlaced through the warp in a woven fabric. 

  • The yarn used for the weft; the fill. 

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