I check ours once a month (it's awkward, down a deep hole in the pavement in the next road).
When it was fitted, the guy who did it noticed the numbers were spinning. The pipe had a leak to the tune of several cubic metres (30 I think) a day. It was caused by a previous tee off the pipe, to a neighbouring property that had just been rebuilt, not being sealed properly if at all.
They fixed it for free, and didn't charge us until the leak was fixed.
It fixed our mysteriously soggy back path, too.
Our cosumption has been interesting (I graph it). It was quite high until older son's long term girlfriend split up with him. Dropped quite a bit. Dropped a lot more when he moved out to his own flat. Bounced up during firts lockdown when younger son's girlfrirnd moved in. She still stays sometimes but we are back down a bit.