Most is what is called a determiner. Most of your time would imply more than half, the most time implies more than the. A determiner is a word, such as a number, article, personal pronoun, that determines (limits) the meaning of a noun.
"Wetten, dass..?" Der letzte Auftritt von Thomas Gottschalk in Bildern
During most of history, humans were too busy to think about thought. I've recently come across a novel called a most wanted man, after which being curious i found a tv episode called a most unusual camera. Why is most of history correct in the above sentence?
Most is defined by the attributes you apply to it.