billfold vs compact

billfold

noun
  • A small, folding sleeve or case designed to hold paper currency, as well as credit cards, pictures, etc. 

compact

noun
  • A small, slim folding case, often featuring a mirror, powder and a powderpuff; that fits into a woman's purse or handbag, or that slips into one's pocket. 

  • A broadsheet newspaper published in the size of a tabloid but keeping its non-sensational style. 

  • An agreement or contract. 

adj
  • Such that every open cover of the given set has a finite subcover. In a Euclidean space this is equivalent to a Closed and bounded set. 

  • Having all necessary features fitting neatly into a small space. 

  • Brief; close; pithy; not diffuse; not verbose. 

  • Closely packed, i.e. packing much in a small space. 

verb
  • To form an agreement or contract. 

  • To make more dense; to compress. 

  • To unite or connect firmly, as in a system. 

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