decline vs rundown

decline

noun
  • A reduction or diminution of activity. 

  • A weakening. 

  • Downward movement, fall. 

  • The act of declining or refusing something. 

  • A sloping downward, e.g. of a hill or road. 

verb
  • To choose not to do something; refuse, forbear, refrain. 

  • To run through from first to last; to recite in order as though declining a noun. 

  • To cause to decrease or diminish. 

  • To bend downward; to bring down; to depress; to cause to bend, or fall. 

  • To turn or bend aside; to deviate; to stray; to withdraw. 

  • To move downwards, to fall, to drop. 

  • To inflect for case, number, gender, and the like. 

  • To reject a penalty against the opposing team, usually because the result of accepting it would benefit the non-penalized team less than the preceding play. 

  • To become weaker or worse. 

  • To recite all the different declined forms of (a word). 

rundown

noun
  • A reduction, e.g. of an activity, or in the size of something, such as a fleet. 

  • A Caribbean stew of meat or fish (typically mackerel) with reduced coconut milk, yam, tomato, onion and seasonings. 

  • A rough outline of a topic or situation. 

  • A summary of the horses to be raced on a particular day, with their weights, jockeys, odds, etc. 

  • A defensive play in which the runner is caught between two fielders, who steadily converge to tag the runner out. 

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