Oh Wow, great job going through your clothes. It's a huge task and definitely forces you to take a good look at your wardrobe.
A couple of years ago I got the Stylebook app for my phone and proceeded to spend the next 6 months (I switch my clothes for winter/summer) taking or finding pictures of my clothes. I included everything.... t-shirts, tanks, leggings, comfy pants, skirts, shoes, boots, belts, scarves, you name it. So I know exactly how much of everything that I have (I won't share the numbers here ☺️). I never even knew of cost per wear until I had this app, but it holds me accountable for purchases and how much I actually own.
I always find it interesting when we talk about the perfect # for a wardrobe because not only is it personal but also numbers are deceptive. For example, I've noticed that you wear a lot of black and have a very dramatic, architectural style which works with your 11 black skirts. Since I'm not a minimalist (disclaimer here), it seems that with a four season climate, that would give you about 3 unique styles per season which would include a fall/spring overlap. Just saying....
Jen