planter vs plower

planter

noun
  • One who plants something. 

  • A box or pot for plants, usually large and standing on the floor. 

  • A machine used for planting seeds. 

  • Any of the early English or Scottish settlers, given the lands of the dispossessed Irish populace during the reign of Elizabeth I. 

  • The owner of a plantation. 

plower

noun
  • One who plows; one who works land with a plow. 

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