health centre vs infirmary

health centre

noun
  • A clinic staffed by a group of general practitioners and nurses 

infirmary

noun
  • A clinic or dispensary within another institution. 

  • A place where sick or injured people are cared for, especially a small hospital; sickhouse. 

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