amplify vs develop

amplify

verb
  • To render larger, more extended, or more intense. 

  • To add content that is not present in the source text to the target text, usually to improve the fluency of the translation. 

  • To increase the amplitude of something, especially of an electric current. 

  • To enlarge by addition or commenting; to treat copiously by adding particulars, illustrations, etc.; to expand. 

develop

verb
  • To advance; to further; to promote the growth of. 

  • To progress through a sequence of stages. 

  • To bring out images latent in photographic film. 

  • To acquire something usually over a period of time. 

  • To place one's pieces actively. 

  • To change with a specific direction, progress. 

  • To create. 

  • To cause a ball to become more open and available to be played on later. Usually by moving it away from the cushion, or by opening a pack. 

  • To change the form of (an algebraic expression, etc.) by executing certain indicated operations without changing the value. 

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