entresol vs portico

entresol

noun
  • A mezzanine; an intermediate floor in a building, typically resembling a balcony; most often, the floor immediately above the ground floor and below a higher floor. 

portico

noun
  • A porch, or a small space with a roof supported by columns, serving as the entrance to a building. 

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