Hi @ABrandt,
Thank you for reaching out to the Community!
I found for you similar threads that might be of interest:
- The solution from @KimM on this post “Custom Code to Count Activities”
- The post from @Kevin-C on this post “Using Custom Code to get activity dates in contact workflow”
- The solution from @karstenkoehler on this post “Activity type & count by Company over period”
I also wanted to invite a couple of subject matter experts to this conversation: Hi @HFisher7, @louischausse and @ChristinaKay do you have suggestions to help @ABrandt, please?
If anybody else has anything to add and/or share, please feel free to join in the conversation 
Thank you very much 
and have a great day!
Best,
Bérangère