refurbish vs spruce up

refurbish

verb
  • To rebuild or replenish with all new material; to restore to original (or better) working order and appearance. 

spruce up

verb
  • To refresh, revamp; to freshen or improve something, especially its appearance. 

  • To dress or arrange smartly, elegantly, and neatly; to smarten. 

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