knock together vs roughcast

knock together

verb
  • To assemble something quickly; to knock up. 

roughcast

verb
  • To apply a roughcast finish to. 

  • To shape crudely; to form in its first rudiments, without correction or polish. 

adj
  • Unpolished. 

noun
  • A crude model. 

  • A rough surface finish, as of a plaster or stucco wall. 

  • A mixture of pebbles or similar material used to finish a plaster or concrete wall. 

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