Parameter quantifying the number of publications expected from a good researcher
Note: I wrote this to answer the original question, which was less specific.

There's no a general answer to this question, because things change a lot by field. 

If you want to have an idea of the extreme variability, you can look at this crazy table which reports the Italian minimum requirements to become tenured associate (II fascia) or full professor (I fascia), divided by field. 

The third and the sixth columns of the linked tables report the minimum number of journal papers that should have been published in, respectively, the last ten and five years to be able to apply for the two positions. Then there are the number of citations and the h-index.

For instance, someone wanting to apply for a full professor position in mathematical logic is required to have at least 4 papers in the last 10 years, whereas an experimental particle physicist is required to have at least 164 publications if the average number of coauthors is between 501 and 1200.