Wait time for co-op board interview

Long story short, my husband and I are trying to buy into a co-op in NYC. Our agent submitted our board package to the buildings' management company on May 4th and dropped off hard copies directly to the building. It is now May 20th and we haven't heard anything back from the management company or the board regarding a board interview. I guess my question is, what is the typical wait time for the board interview after submitting the board package? Should my husband and I be worried? Is there any type of follow up we can do or it is just an excruciating waiting game?