decline vs travel

decline

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

  • 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 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). 

noun
  • A weakening. 

  • Downward movement, fall. 

  • A reduction or diminution of activity. 

  • The act of declining or refusing something. 

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

travel

verb
  • To pass from one place to another; to move or transmit 

  • To move illegally by walking or running without dribbling the ball. 

  • To travel throughout (a place). 

  • To force to journey. 

  • To be on a journey, often for pleasure or business and with luggage; to go from one place to another. 

noun
  • An account of one's travels. 

  • The working motion of a piece of machinery; the length of a mechanical stroke. 

  • The activity or traffic along a route or through a given point. 

  • Distance that a keyboard's key moves vertically when depressed. 

  • The act of traveling; passage from place to place. 

  • A series of journeys. 

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