The irs mailed my amended return refund on 2/25 how long does it take for me to receive my check? Is it 3-5 business days?

I called the IRS and they said they mailed out my amended return on the 25 of Feb 2019. My question is, how long does it take to receive my refund? Is it 3-5 business days? It’s my 2017 amended return.took them a year to finish...