pernoctation vs sleepaway

pernoctation

noun

  • The action of abiding through the night at a location; (countable) an instance of this; an overnight stay. 

  • The action of walking about at night, especially as a vigil or watch; (countable) an instance of this. 

sleepaway

noun

  • A camp or event in which participants sleep away from home. 

adj

  • Of a camp or event in which participants sleep away from home. 

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