Which preposition to use with simplification

of Occurrences 35%

We cannot illustrate our contention better than from the popular simplification of Ethics introduced by Bentham.

in Occurrences 2%

"There has been considerable simplification in agricultural labor already, which would have been more conspicuous, had it not been for the excessive drought which has prevailed since 1834.

into Occurrences 1%

In reconstructing his apparatus, Mr. Naudin has availed himself of the experience already acquired, and has necessarily had to introduce important modifications and simplifications into the process.

like Occurrences 1%

True we should not have altogether got rid of innate tendencies, but we should have reduced them to one, namely, to the struggling, or persisting, or self-asserting tendency; a simplification like that offered by the matter-and-force theory of Buchner.

than Occurrences 1%

To simplify seems forced, and I think Mrs. Gustus struck harder on the note of simplification than that of simplicity.

Which preposition to use with  simplification