Which preposition to use with pamphleteering

for Occurrences 1%

Swift, at this time, was deep in work, pamphleteering for Harley and St. John.

of Occurrences 1%

If one is not subject to the spirit of ancestor worship that has long ruled American history, one is bound to say thatapart from some forceful pamphleteering of transient purposethe voluminous political literature of the formative period displays much pedantic erudition but has little that goes really deep.

Which preposition to use with  pamphleteering