lapa vs quadrangle

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. 

quadrangle

noun
  • The buildings forming the border of such a courtyard. 

  • A geometric shape with four angles and four straight sides; a four-sided polygon. 

  • A courtyard which is quadrangular. 

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