Definition of "fecundity"

In the early days the reviewers compared him to the late Douglas Adams, but then Terry went on to write books as enthusiastically as Douglas avoided writing them, and now, if there is any comparison to be made of anything from the formal rules of a Pratchett novel to the sheer prolific fecundity of the man, it might be to P. G. Wodehouse.

2006, Neil Gaiman, “Neil Gaiman on Terry Pratchett”, in Good Omens, Corgi, page 410

[I]t would not be very much less absurd for someone to write about New York City after having spent only a few years or a few decades in this metropolis of inexhaustible adventure, of terrifying emotional fecundity, of uncapturable character.

1946, George Johnston, Skyscrapers in the Mist, page 52