decline vs dipping

decline

noun
  • Downward movement, fall. 

  • A weakening. 

  • A reduction or diminution of activity. 

  • 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). 

dipping

noun
  • The act of inclining downward. 

  • The act or fact of missing out on seeing a bird. 

  • The use of dipping tobacco (moist snuff) in the mouth, usually between the lip and gum or cheek and gum in the lower or upper part of the mouth. 

  • The act of lifting or moving a liquid with a dipper, ladle, or the like. 

  • An act or process of immersing. 

  • The process of cleaning or brightening sheet metal or metalware, especially brass, by dipping it in acids, etc. 

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