fee vs rate

fee

verb
  • To reward for services performed, or to be performed; to recompense; to hire or keep in hire; hence, to bribe. 

noun
  • A right to the use of a superior's land as a stipend for certain services to be performed, typically military service. 

  • An additional monetary payment charged for a service or good that is minor compared to the underlying cost. 

  • Synonym of fief: the land so held. 

  • An inheritable estate in land, whether absolute and without limitation to potential heirs (fee simple) or with limitations to particular kinds of heirs (fee tail). 

  • An inheritable estate in land held of a feudal lord on condition of performance of certain services, typically military service. 

rate

verb
  • To deserve; to be worth. 

  • To ascertain the exact rate of the gain or loss of (a chronometer) as compared with true time. 

  • To berate, scold. 

  • To assign or be assigned a particular rank or level. 

  • To evaluate a property's value for the purposes of local taxation. 

  • To evaluate or estimate the value of. 

  • To have position (in a certain class). 

  • To have value or standing. 

  • To determine the limits of safe functioning for a machine or electrical device. 

  • To consider or regard. 

  • To like; to think highly of. 

  • To ratify. 

noun
  • A class into which ships were assigned based on condition, size etc.; by extension, rank. 

  • The price of (an individual) thing; cost. 

  • The gain or loss of a timepiece in a unit of time. 

  • The relative speed of change or progress. 

  • The proportional relationship between one amount, value etc. and another. 

  • A set price or charge for all examples of a given case, commodity, service etc. 

  • A wage calculated in relation to a unit of time. 

  • Any of various taxes, especially those levied by a local authority. 

  • Speed. 

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