comme il faut vs desirable

comme il faut

adj

  • Proper; in keeping with etiquette or social standards. 

desirable

adj

  • Worthy to be desired; pleasing; agreeable. 

noun

  • A thing that people want; something that is desirable. 

How often have the words comme il faut and desirable occurred in a corpus of books? (source: Google Ngram Viewer )