drop in the bucket vs ration

drop in the bucket

noun
  • Something of little importance, especially an inconsequential effort or action as compared to a huge problem. 

ration

noun
  • A portion of some limited resource allocated to a person or group. 

verb
  • To supply with a ration; to limit (someone) to a specific allowance of something. 

  • To restrict (an activity etc.) 

  • To portion out (especially during a shortage of supply); to limit access to. 

How often have the words drop in the bucket and ration occurred in a corpus of books? (source: Google Ngram Viewer )