Which preposition to use with productivity

of Occurrences 17%

The productivity of her agricultural and industrial work has been killed by communism, and the force of work has been reduced to a minimum.

in Occurrences 4%

Therefore he went to Holland in 1629, and spent twenty years of quiet productivity in Amsterdam, Franecker, Utrecht, Leeuwarden, Egmond, Harderwijk, Leyden, the palace of Endegeest, and five other places.

Which preposition to use with  productivity