asset vs stumbling block

asset

noun
  • A woman's breasts or buttocks or a man's genitalia. 

  • Coordinate term: liability 

  • Any component, model, process or framework of value that can be leveraged or reused. 

  • An intelligence asset. 

  • A thing or quality that has value, especially one that generates cash flows. 

  • Any item recorded on the left-hand side of a balance sheet. 

stumbling block

noun
  • A hindrance, obstacle or impediment; an opportunity for error. 

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