Count Paired Items In Listed Combinations
Explanation We want to count how often items in columns B, C, and D appear together. For example, how often A appears with C, B appears with F, G appears with D, and so on. This would seem like a perfect use of COUNTIFS, but if we try to add criteria looking for 2 items across 3 columns, it isn’t going to work. A simple workaround is to join all items together in a single cell in a helper column , then use COUNTIFS with a wildcard to count items....