herd vs plough

herd

verb
  • To move or drive a herd. 

  • To manage, care for or guard a herd 

  • To act as a herdsman or a shepherd. 

  • To unite or associate in a herd 

  • To associate; to ally oneself with, or place oneself among, a group or company. 

  • To unite or associate in a herd; to feed or run together, or in company. 

  • To form or put into a herd. 

noun
  • A number of domestic animals assembled together under the watch or ownership of a keeper. 

  • Any collection of animals gathered or travelling in a company. 

  • A crowd, a mass of people or things; a rabble. 

plough

verb
  • To move with force. 

  • To use a plough. 

  • To use a plough on soil to prepare for planting. 

  • To fail (a student). 

  • To run through, as in sailing. 

  • To cut a groove in, as in a plank, or the edge of a board; especially, a rectangular groove to receive the end of a shelf or tread, the edge of a panel, a tongue, etc. 

  • To have sex with, penetrate. 

  • To furrow; to make furrows, grooves, or ridges in. 

  • To trim, or shave off the edges of, as a book or paper, with a plough. 

noun
  • A device pulled through the ground in order to break it open into furrows for planting. 

  • A joiner's plane for making grooves. 

  • A bookbinder's implement for trimming or shaving off the edges of books. 

  • The use of a plough; tillage. 

  • A yoga pose resembling a traditional plough, halāsana. 

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