The phrase 'assent for' is not a grammatically correct phrase.
It is not usable in written English. The phrase you are looking for might be 'consent for.' For example: I asked her for consent for the trip.
Heads around the table nodded assent, for very Italian reasons.
(Mohammed gave his personal assent for construction, apparently).
He secured the president's assent for new elections.
I would be very optimistic about the prospects of getting royal assent for it".
Seals were also used to affirm assent; for example, by a jury.
When Romeo and Juliet first meet, Romeo looks up at Shakespeare, who nods his assent for them to kiss.
If we were to retain public support, or at least assent, for these, we must lean over backwards in assuaging their environmental concerns.
The constitutional roles of each – the executive and the legislature – must be respected, beginning with parliamentary involvement and assent for the invoking of article 50".
By convening a formal session with the leaders of Congress and asking for their assent for making war, he has effectively put the issue before the electorate.
One was excluded because of academic scheduling conflicts, and 15 provided informed consent (or assent, for minors) to enroll.
Caregivers provided written consent for participation and children ages seven and over also provided assent for participation.
