I told my college students that the more they wrote, the better writers they became.
I gave feedback within a day or two for short assignments and within two weeks for long ones. My students got better, even when the assignments became more difficult.
A Nature Neuroscience article says that practicing beyond mastery cements learning.
Another study says:
In procedural learning, individuals repeat a complex activity over and over again until all relevant neural systems work together to automatically produce the activity. It is essential for the development of any motor skill or cognitive activity.
The researchers hypothesized that brief periods of memory reactivation would be sufficient to improve basic visual perception and yield a full normal learning curve, supporting a new paradigm of human learning dynamics. They based their hypothesis on knowledge accumulated from studies in animal models.
If you aren’t writing everyday, you are shorting yourself of significant gains.
If you are writing everyday, good for you!