floriculture vs refinement

floriculture

noun
  • the farming of flowers 

refinement

noun
  • High-class style; cultivation. 

  • The act, or the result of refining; the removal of impurities, or a purified material 

  • A fine or subtle distinction. 

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