How Many Runs per Week Build Consistency?
Choose a frequency you can recover from and hold before adding more.
Plain answer
There is no universal number. Begin from your current training, spread demanding efforts, and repeat the same frequency long enough to observe recovery before changing it.
Count the rest of your life
Physical work, sleep loss, strength training, illness, and stress all affect what a running week costs.
Frequency is only one variable
Distance, pace, terrain, heat, and duration can raise load even when the number of runs stays constant. Change one thing at a time.
Build a floor before a ceiling
Define the smallest successful week. Additional runs can be optional rather than turning a busy week into failure.