herd vs trade

herd

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

  • To manage, care for or guard a herd 

  • To act as a herdsman or a shepherd. 

  • To unite or associate in a herd 

  • To move or drive a herd. 

  • 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. 

trade

verb
  • To have dealings; to be concerned or associated (with). 

  • To recommend and get recommendations. 

  • To be traded at a certain price or under certain conditions. 

  • To engage in trade. 

  • To mutually exchange (something) (with). 

  • To give someone a plant and receive a different one in return. 

  • To do business; offer for sale as for one's livelihood. 

  • To give (something) in exchange (for). 

adj
  • Of a product, produced for sale in the ordinary bulk retail trade and hence of only the most basic quality. 

noun
  • The skilled practice of a practical occupation. 

  • A particular instance of buying or selling. 

  • Those who perform a particular kind of skilled work. 

  • Those engaged in an industry or group of related industries. 

  • An occupation in the secondary sector, as opposed to an agricultural, professional or military one. 

  • The business given to a commercial establishment by its customers. 

  • Buying and selling of goods and services on a market. 

  • An instance of bartering items in exchange for one another. 

  • A publication intended for participants in an industry or related group of industries. 

  • A masculine man available for casual sex with men, often for pay. (Compare rough trade.) 

  • Steady winds blowing from east to west above and below the equator. 

  • Refuse or rubbish from a mine. 

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