If it takes a man a week to walk a fortnight how many apples are in a grape?

This question is nonsensical and does not have a clear answer. A fortnight is a period of two weeks, so the statement "it takes a man a week to walk a fortnight" is contradictory. Additionally, the number of Apples in a grape is not a well-defined or meaningful concept. Therefore, it is not possible to provide a quantitative answer to this question.