drafting vs gestation

drafting

noun
  • The act or process of producing a technical drawing, or draft. 

  • A method of preparing fibers for weaving. 

  • The practice among ground vehicle drivers or cyclists of following in a close line to reduce wind resistance. 

  • A profession, usually related to making technical drawings for architecture, engineering, or manufacturing. 

gestation

noun
  • The process of development of a plan or idea. 

  • The period of time during which an animal or human offspring physically develops inside the mother's body until it is born. 

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