cultivation vs furtherance

cultivation

noun
  • Advancement or refinement in physical, intellectual, or moral condition 

  • The art or act of cultivating; improvement of land for or by agriculture 

  • The state of being cultivated or used for agriculture 

  • Devotion of time or attention to the improvement of (something) 

furtherance

noun
  • Advancement or progress. 

  • Promotion. 

  • The act of furthering or helping forward 

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