pocket square vs towel

pocket square

noun
  • A handkerchief worn in a breast pocket as an accessory to a suit. 

towel

noun
  • A cloth used for wiping, especially one used for drying anything wet, such as a person after a bath. 

verb
  • To dry by using a towel. 

  • To block up (a door, etc.) with a towel, to conceal the fumes of a recreational drug. 

  • To hit with a towel. 

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