ambition vs constraint

ambition

noun
  • An object of an ardent desire. 

  • Eager or inordinate desire for some object that confers distinction, as preferment, honor, superiority, political power, or fame; desire to distinguish one's self from other people. 

  • A personal quality similar to motivation, not necessarily tied to a single goal. 

  • A desire, as in (sense 1), for another person to achieve these things. 

verb
  • To seek after ambitiously or eagerly; to covet. 

constraint

noun
  • An irresistible force or compulsion. 

  • A condition that a solution to an optimization problem must satisfy. 

  • A linkage or other restriction that maintains database integrity. 

  • The repression of one's feelings. 

  • Something that constrains; a restriction. 

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