If two or more instances of the phenomenon under investigation have only one circumstance in common, the circumstance in which alone all the instances agree, is the cause (or effect) of the given phenomenon.
If two or more instances of the phenomenon under investigation have only one circumstance in common, the circumstance in which alone all the circumstances agree is the cause or the effect of the given phenomenon.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "more instances" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.