conquest vs hold hostage

conquest

verb
  • To compete with an established competitor by placing advertisements for one's own products adjacent to editorial content relating to the competitor or by using terms and keywords for one's own products that are currently associated with the competitor. 

noun
  • Victory gained through combat; the subjugation of an enemy. 

  • That which is conquered; possession gained by force, physical or moral. 

  • An act or instance of overcoming an obstacle. 

  • A competitive mode found in first-person shooter games in which competing teams (usually two) attempt to take over predetermined spawn points labeled by flags. 

  • A person whose romantic affections one has gained, or with whom one has had sex, or the act of gaining another's romantic affections. 

hold hostage

verb
  • To seek advantage in a situation by threatening the well-being or success of (a person or thing not directly involved in the situation). 

  • To hold in custody or use for any advantage. 

  • To have possession or custody of (a person) as security for performance against a treaty, a pledge, or a demand, especially now an extra-legal demand. 

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