cultivate vs try to get someone on one's side

cultivate

verb
  • To turn or stir soil in preparation for planting. 

  • To nurture; to foster; to tend. 

  • To grow plants, notably crops. 

try to get someone on one's side

How often have the words cultivate and try to get someone on one's side occurred in a corpus of books? (source: Google Ngram Viewer )