courtyard vs lapa

courtyard

noun
  • An area, open to the sky, partially or wholly surrounded by walls or buildings. 

lapa

noun
  • An open structure in South Africa, typically a thatched roof supported by wooden poles. 

  • A metal wind instrument of 19th-century China, resembling the oboe. 

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