Approach to synonym keywords when you already rank in position #0 and #1

[Nobody1599597270247]

Hello community!

My site cryochambers.com is ranked #0 and #1 for the most important keyword in the cryotherapy industry:
"cryo chamber":  page A
"cryo chamber cost":  page A
"cryotherapy chamber":  page B

A couple new keyword are also trending now:
"cryogenic" replaces "cryotherapy"
"machine" replaces "chamber"

I would be most grateful if you can suggest an approach to also rank #1 and #0 with the variants?

FYI:
Page A: https://www.cryochambers.com/
Page B: https://www.cryochambers.com/cryo-chamber-sauna-cost/

[Chris.Menke]

Don't think of your page as a place for keywords. Think of it as a place to use words to explain what your product is, what solutions it provides and what audience it serves. Sure, you need to sprinkle your keyword(s) in there in the appropriate places but it all the other words that are going to make a difference.

By your question, it looks like you may be overly focused on the search term you want to rank for, at the expense of words that describe the concepts.

Google's algorithm is advanced. It can tell between gratuitous copy and what's been written by experts. However, many  experts don't know how to write for search engines. Scientists and academics like to save the best for last. Google rewards displays of expertise at the beginning of the page.

What you need is an expert writer and someone on  staff  who already knows the answers to the questions you're asking.