Keyword occurance in academic papers (google scholar)

This function gets the amount of hits for a specific keyword per year, using google scholar. Inspired by https://zenodo.org/record/1218409

List the hits for a specific acedamic keyword by year using google scholar.

Input: Search term as string, start year as number, end year as number, extrapolate 0 or 1: Extrapolates if the year is not finished yet

Example, simple search term: keyword_occurances = academic_keyword_occurance ('PIVlab',2010,2022,0)

Example, advanced search terms: keyword_occurances = academic_keyword_occurance ('("pivlab" | "piv lab") AND ("piv" | "particle image velocimetry") -"@pivlab.net"',2010,2022,0)

The function returns a list with the amount of keyword hits per year.