lack of inspiration vs pedestrianism

lack of inspiration

pedestrianism

noun
  • Going on foot; walking. 

  • Something that is pedestrian, or banal; a commonplace. 

  • A form of competitive walking of the nineteenth century, often professional and funded by wagering, from which the modern sport of racewalking developed. 

How often have the words lack of inspiration and pedestrianism occurred in a corpus of books? (source: Google Ngram Viewer )