keep vs perform

keep

verb
  • To maintain (an establishment or institution); to conduct; to manage. 

  • To supply with necessities and financially support (a person). 

  • To refrain from freely disclosing (a secret). 

  • To continue in (a course or mode of action); to not intermit or fall from; to uphold or maintain. 

  • To remain edible or otherwise usable. 

  • To remain in a state. 

  • To observe; to adhere to; to fulfill; to not swerve from or violate. 

  • To raise; to care for. 

  • To have habitually in stock for sale. 

  • To act as wicket-keeper. 

  • To enter (accounts, records, etc.) in a book. 

  • To maintain the condition of; to preserve in a certain state. 

  • To restrain. 

  • To watch over, look after, guard, protect. 

  • To maintain possession of. 

  • To record transactions, accounts, or events in. 

  • To remain faithful to a given promise or word. 

  • To continue. 

noun
  • The state of being kept; hence, the resulting condition; case. 

  • A cap for holding something, such as a journal box, in place. 

  • The food or money required to keep someone alive and healthy; one's support, maintenance. 

  • The main tower of a castle or fortress, located within the castle walls. 

perform

verb
  • To act in accordance with (a contract); to fulfill one’s terms of (a contract). 

  • To fulfill contractually agreed-to terms. 

  • To exhibit an expected pattern of behavior; to function; to work. 

  • To do (something); to execute. 

  • To do (something) in front of an audience, such as acting or music, often in order to entertain. 

  • To behave theatrically so as to give the impression of (a quality, character trait, etc.); to feign. 

  • To behave in accordance with, and thereby in turn shape, (a social notion or role). 

  • To behave in ways that carry meaning in social contexts. 

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