It will depend on many factors.
At my institution, we have many nursing programs
(high school entry, transfer, Direct Entry MSN, MSN, Post-MSN, PHD, DNP). Each has different deadlines. With some programs all decisions are posted online at the same time; other programs have "rolling admissions" which gives you a response approximately 1 month after we have received all the transcripts, recommendations, etc.
It will also depend on how many applications are received and who reads the files. Faculty are very busy with their own teaching and clinical assignments, so involving faculty review in applications is resource-intensive and time-consuming. The number of applications received also affects the time taken to review everything. For example, we have a BSN program that admits students directly from high school (with nursing classes starting in the freshman year). This year we received over 540 applications for 60 spaces. With 9 applications for every space in this class, the admissions committee will spend a lot of time reviewing and discussing the candidates.