matching vs of a piece

matching

adj
  • The same as another; sharing the same design. 

noun
  • A set of independent edges in a given graph, i.e. a set of edges which do not intersect, such that pairs of vertices are "matched" to each other one to one. 

  • The process by which things are matched together or paired up. 

of a piece

prep
  • Used other than figuratively or idiomatically: see of, a, piece. 

  • Of the same kind. 

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