attachment vs courtship

attachment

noun
  • The act or process of (physically or figuratively) attaching. 

  • The means by which something is physically attached. 

  • Taking a person's property to satisfy a court-ordered debt. 

  • A device attached to a piece of equipment or a tool. 

  • A strong bonding with or fondness for someone or something. 

  • A file sent along with a message, usually an email. 

  • The act or process by which any (downward) leader connects to any available (upward) streamer in a lightning flash. 

  • A dependence, especially a strong one. 

courtship

noun
  • The act of trying to solicit a favour or support from someone. 

  • The behaviour exhibited by an animal to attract a mate. 

  • The act of wooing a person to enter into a romantic relationship or marriage; hence, the period during which a couple fall in love before their marriage. 

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