Berliner vs jam doughnut

Berliner

noun
  • A doughnut (donut) with a sweet filling. 

  • A native or inhabitant of Berlin. 

  • A newspaper format with pages normally measuring about 315 by 470 millimetres (12.4 in × 18.5 inches), slightly taller and wider than a tabloid but narrower and shorter than a broadsheet. 

jam doughnut

noun
  • A doughnut filled with jam and usually topped with sugar. 

How often have the words Berliner and jam doughnut occurred in a corpus of books? (source: Google Ngram Viewer )