This document is important to read as it explains the basics of caching at Cloudflare:
The first time a URL is requested in a location where the cache is empty or expired, you would get a request to your origin server. This is called a cache MISS. Once the cache is populated in that location, all subsequent requests for the same URL in that location would be a cache HIT until the TTL expires.
Hence if you have 5000 requests, a small % of those would be MISS and the rest would be a cache HIT. A HIT means the request was served from cache without talking to your origin.