Which preposition to use with ethnologists

during Occurrences 1%

On the terms "wool" and "woolly" severe controversies, which have not yet closed, have taken place among ethnologists during the last ten years.

of Occurrences 1%

We had always thought a high sense of personal honor an essential element of chivalry; but among the Romanic races, by which, as the wonderful ethnologist of "De Bow's Review" tells us, the Southern States were settled, and from which they derive a close entail of chivalric characteristics, to the exclusion of the vulgar Saxons of the North, such is by no means the case.

Which preposition to use with  ethnologists