prurient vs soft-core

prurient

adj
  • Arousing or appealing to sexual desire. 

  • Curious, especially inappropriately so. 

  • Uneasy with desire; itching; especially, having a lascivious anxiety or propensity; lustful. 

soft-core

How often have the words prurient and soft-core occurred in a corpus of books? (source: Google Ngram Viewer )