I think in over 54 years of riding I've only broken one maybe two spokes. My Schwinn Varsity I had for over thirty-five year and never broke a spoke on it.
Why are they breaking? Chain falling off the cassette a lot and wedging against the spokes? I think the bike comes with 32 spoke wheels, so that should be enough for most any rider weight.
Do you check your spokes regularly to make certain none are getting loose? A bunch of loose spokes probably increases the chance one will break. But I don't know for sure, I never let that happen.