intermediate school vs lyceum

intermediate school

noun
  • A school for children that serves grades between elementary school and high school, and occasionally between the former and middle school. These grades vary from anywhere from grade 4 to grade 8. 

lyceum

noun
  • A school, especially European, at a stage between elementary school and college, a lycée. 

  • A public hall designed for lectures, readings, or concerts. 

  • An association for literary improvement. 

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