moth vs source

moth

noun
  • Anything that gradually and silently eats, consumes, or wastes any other thing. 

  • A usually nocturnal insect of the order Lepidoptera, distinguished from butterflies by feather-like antennae. 

  • The plant Vigna aconitifolia, moth bean. 

verb
  • To hunt for moths. 

source

noun
  • The person, place, or thing from which something (information, goods, etc.) comes or is acquired. 

  • A reporter's informant. 

  • Source code. 

  • The name of one terminal of a field effect transistor (FET). 

  • Spring; fountainhead; wellhead; any collection of water on or under the surface of the ground in which a stream originates. 

verb
  • To obtain or procure: used especially of a business resource. 

  • To find information about (a quotation)'s source (from which it comes): to find a citation for. 

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