Which preposition to use with exemplifications

of Occurrences 60%

The regularity and evenness of the dentition of the Anoplotherium, as contrasted with that of existing Artiodactyles, and the assumed nearer approach of the dentition of certain ancient Carnivores to the typical arrangement, have also been cited as exemplifications of a law of progressive development, but I know of no other cases based on positive evidence which are worthy of particular notice.

in Occurrences 4%

"As the irrefutable and all-enduring truths of Democracy receive exemplification in contemporaneous events, the reflecting and refined masses of this city purchase the World in preference to that decrepit and fast decaying sheet, the Herald.

by Occurrences 2%

Their vitality is also clearly shown in their constant use and exemplification by the romance and novel writers who appeal with certainty and success to the popular taste in the tales of spectral terrors.

than Occurrences 1%

Snobbery has no greater exemplification than in the relations of the local Lutheran pastor and the local landlord or millionaire.

Which preposition to use with  exemplifications