incipient vs preparatory

incipient

adj
  • In an initial stage; beginning, starting, coming into existence. 

noun
  • A verb tense of the Hebrew language. 

preparatory

adj
  • Of or pertaining to preparation, having the purpose of making something or someone ready, preparative. 

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