Not my place to say...such a personal decision.
I would recommend you voice your concern to your spouse...see if he is concerned too.
For us, MC and IC is critical. We could not do this on our own. At times I think it is getting really expensive. MC once a week...IC for each of us ALMOST as frequently. My WW going more regularly to IC. But then I think what else would I desire to spend money on?
I love my wife. I love myself. To help both of these loves...we need external help.
There was a point in our R where I chose to skip a few MC sessions...I was derailing them by not controlling my rage. But now I am back to it.
Dont think of any one pattern as constant within R. You could just spread out the sessions like has been suggested...two things could happen.
First, you could find out that the counselor read your situation correctly...and you and your husband will continue to learn how to R more on your own then with C help. You save money and real intimacy just between you and your husband is self generated! yeah!!!!
Second, you could find out that reduced sessions hurts your R. sigh. You pick up the phone and increase your sessions.
This is a dynamic process.
Another point that I have considered...counselors get paid from each visit. They also have reputations to protect. If your counselor is willing to give up income and chance being wrong on her current evaluation of your marriage...she must see something really positive and strong within you guys.
This is a good sign.
Scary I know. But as I gain strength the scariness goes away.
God be with us all.