You wrote one page to cover five keywords so you would not have to write five pages. Now it ranks for none of them, and each of those five keywords has a page somewhere else that is only about that.
A page that answers one question well beats a page that half answers five. This is not a rule about keyword counts, it is about what the person who clicked was looking for and whether the page delivered it in the first screen.
"How many internal links per page" and "how many internal links per page seo" are the same question and belong on one page. "Internal linking" and "crawl budget" are different questions and need different pages, however close they feel to you.
When three of your own pages half cover the same term, the search engine picks one, and it usually picks the wrong one. Your traffic does not split, it collapses to the weakest of the three.
The other four keywords are not lost, they are your next four pages, and each of them can be short. Three hundred honest words that answer one question outrank two thousand that avoid it.
This is teaching material and our own reading of standard practice, not advice for your specific site. Check anything important with your own specialist.
Run the free check, then tell us what it found. We reply with what to fix first and why. No call, no pitch.
If a word here is unfamiliar it is defined in the SEO glossary. Two public penalties and one problem we found on our own network are pulled apart in the case studies, and the longer pieces live in the library.