affiliated vs attached

affiliated

adj
  • Associated, related, or united; subject to a particular affiliation. 

attached

adj
  • Connected; joined. 

  • Broadly joined to a stem or stipe, but not decurrent. 

  • Fond of (used with to). 

  • In a romantic or sexual relationship. 

  • Of a residential building, sharing walls with similar buildings on two, usually opposite, sides. 

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