I am trying to determine the search volume of an Exact Match Keyword. For e.g. There are two keywords [italian chopped salad] has a local search volume of 320 & [chopped italian salad] has a local search volume of 73 So, If I want to target or estimate demand for either italian chopped salad or chopped italian salad, can I assume my total demand to be 373 or is on a sub-set of another? What is a realistic volume to estimate search volume for both keywords together?