→ Day in, day out
→ Day after day
→ Again and again
→ Time after time
→ Over and over
→ Many a time and oft
→ The daily grind
→ Consistency is key
You get the idea. This list could go on with many more expressions relating to regular routine.
While the process is seldom glamorous, extraordinary results are a product of the seemingly mundane act of regularly showing up and doing the work rather than putting in inconsistent extraordinary effort.