land mine vs ruin

land mine

noun
  • A critical subject or situation with concealed or unpredictable implications. 

  • A piece of exercise device consisting of a pivoting tube attached to the ground to which a barbell can be fitted to lift it off the ground. 

  • A mine that is placed on land and designed to explode when stepped upon or touched. 

ruin

noun
  • Something that leads to serious trouble or destruction. 

  • The state of being a ruin, destroyed or decayed. 

  • A change that destroys or defeats something; destruction; overthrow. 

  • The remains of a destroyed or dilapidated construction, such as a house or castle. 

  • The act of ruining something. 

  • Complete financial loss; bankruptcy. 

verb
  • To seduce or debauch, and thus harm the social standing of. 

  • To make something less enjoyable or likeable. 

  • To upset or overturn the plans or progress of, or to have a disastrous effect on something. 

  • To cause the fiscal ruin of; to bankrupt or drive out of business. 

  • To destroy or make something no longer usable. 

  • To reveal the ending of (a story); to spoil. 

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