1. A method of determining non-numerical population metrics using a computing device comprising: a. comparing a plurality of entities with a processor of the computing device thereby forming one or more entity comparisons, wherein each entity has a common non-numerical attribute and corresponding non-numerical value such that the one or more entity comparisons each associate two of the corresponding non-numerical values forming a non-numerical attribute value pair; b. determining a coverage percentage for one or more of the non-numerical attribute value pairs based on the one or more entity comparisons with the processor; c. storing the coverage percentage in a memory of the computing device; and d. determining a non-numerical population metric based on the coverage percentage with the processor; wherein the two of the corresponding non-numerical values forming the non-numerical attribute value pair come from different entities of the plurality of entities.