Generally, but not always, from an hour to three years.
In this system thoughts do not usually manifest instantly. This serves as protection from negative thoughts.
There is a delay as other thoughts modify whatever thoughtform you are projecting. If you think “I am wealthy,” your doubts and contrary beliefs can dilute the thoughtform during the period that elapses between when you think that thought and its eventual manifestation.
In reality time does not exist. Going deeper it is also true to say that thoughts manifest instantaneously, but you don’t catch up to those events for anywhere from an hour to ten years.