Which preposition to use with phlebotomy

in Occurrences 2%

To this opinion of his, [1503]Felix Plater is quite opposite, "though some wink at, disallow and quite contradict all phlebotomy in melancholy, yet by long experience I have found innumerable so saved, after they had been twenty, nay, sixty times let blood, and to live happily after it.

of Occurrences 1%

If he have leisure to be idle (that is to study), he has a smatch at alchemy, and is sick of the philosopher's stone; a disease uncurable, but by an abundant phlebotomy of the purse.

Which preposition to use with  phlebotomy