Which preposition to use with guesswork

about Occurrences 2%

Until you can take a precipitate of his thoughtsthe very thoughts he is unconscious of himselfand put them under a microscope, why, there must be a lot of guesswork about the source of all unconventional human actions.

on Occurrences 2%

"It is only guesswork on my part, of course.

for Occurrences 1%

All classes and types of life in Paris were mixed up in this retreat, and among them were men I knew, so that I needed no guesswork for their stories.

in Occurrences 1%

He had never understood the intuitions of women and thought them more often shrewd guesswork in which they were as likely to be wrong as right.

of Occurrences 1%

Nor is it directly denied, except by those who from habitual disgust reject the guesswork of the various pretenders to scientific systems; yet even these, no less than others, do practically admit it in their common intercourse with the world.

from Occurrences 1%

The Admiralty accept no guesswork from the hunters about their exploits; they must bring the brush to prove the kill.

as Occurrences 1%

It was all guesswork as to whether or not they were headed for the island.

Which preposition to use with  guesswork