Fore most or is it for most?

Answer 1

The answer depends on how you are using the words.

The term for most is part of a prepositional phrase; for example:

"For most of the day, I played tag with my friends."

"Our medic is available for most emergencies."

The compound word foremost is an adjective or an adverb; for example:

"The book is a new release of the foremost author in Science Fiction."

"The foremost requirement is to get funding for the project."

Answer 2

The correct phrase is "foremost" which means most importantly or above all others. "For most" would imply something that applies to the majority of cases.