agronomist vs clodhopper

agronomist

noun
  • A scientist whose speciality is agronomy. 

clodhopper

noun
  • A clumsy or foolish person. 

  • Any kind of shoe. 

  • A strong shoe for heavy-duty use, a boot. 

  • A peasant or yokel. 

  • Wheatear; any of various passerine birds. 

  • United States Navy ankle length work shoes, distinct from dress shoes or combat boots. 

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