"most frequently with" is correct and usable in written English.
You can use it to emphasize that certain actions or events occur more often in conjunction with others. For example, "We see this criticism most frequently with politicians."
But blacks were wounded most frequently, with nine cases.
She stays in constant contact with her Art of Teaching colleagues, most frequently with Mary Hebron, director of elementary education.
He worked most frequently with Reynolds, but also with John Wayne and James Stewart and doubled for Boone, Clint Walker and Gary Lockwood on a regular basis.
Agenesis of the lung may be unilateral, a relatively common defect, or bilateral, the latter occurring most frequently with acardia (failure of the heart to develop).
Asked to list the foreign countries they would consider moving to, America came up most frequently, with 42% of non-Americans mentioning it, followed by Britain and Canada.
Her 40-odd years of innovative creation and performance have brought about some memorable collaborations, most frequently with Robert Rauschenberg but also with Robert Whitman, Donald Judd, Nancy Graves, Terry Winters and Fujiko Nakaya.
Australia appears most frequently, with 10 of its young universities in the top 50, followed by Spain which has five, then Malaysia and Hong Kong, which both have four.
Syncope, or fainting, occurred most frequently, with a rate of 8.2 reports per 100,000 vaccine doses, followed by 7.5 per 100,000 for local site reactions and 6.8 per 100,000 for dizziness.
This leads to a handshaking process that ends, most frequently, with the tag transmitting its ID.
During the GBR procedure, xenogenic bone was used the most frequently with absorbable membrane (Table 2).
As can be seen, the term itself co-occurs most frequently with the terms such as company, market, product, person, and ability.
