coupling vs gusset

coupling

noun
  • A device that couples two things together. 

  • The property of physical systems that they are interacting with each other 

  • Sexual intercourse. 

  • Act of joining together to form a couple. 

  • The degree of reliance between two or more software modules. 

  • A connection between two electronic circuits such that a signal can pass between them. 

gusset

noun
  • A gousset, a piece of mail providing protection where armor plates meet. 

  • A large flat metal piece wider than the valley to help prevent build-up at the base of the valley, either from debris or ice dam formations. 

  • A kind of bracket, or angular piece of iron, fastened in the angles of a structure to give strength or stiffness; especially, the part joining the barrel and the fire box of a locomotive boiler. 

  • A small piece of cloth inserted in a garment, for the purpose of strengthening some part or giving it a tapering enlargement cf. godet. 

  • An abatement or mark of dishonor in a coat of arms, resembling a gusset. 

verb
  • To make with a gusset; to sew a gusset into. 

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