The usual timeframe is within 21 days of acceptance, but at the moment things can potentially run a little slower than usual due to the current situation. The most accurate way to track your refund is through the IRS refund tracking through Where's My Refund?.
Please refer to the following updates on the IRS website posted below.
https://www.irs.gov/newsroom/irs-operations-during-covid-19-mission-critical-functions-continue