It will take about 2-3 weeks (from the date application is marked closed), if you did not request for your certificate to be expedited.
In our case I requested for certificates to be expedited cpl of days before the ceremony (but it was rejected) but during the Oath ceremony the clerk acknowledge the expedite request and said that she will send the certificate by post the next day provided we send the signed Oath forms(by email) as soon as the ceremony is finished.
Oath: Sep 13
File Closed: Sep 14 (Tracker updated on Sep 15)
Certificate received by standard Canada Post mail: Sep 16
https://www.canadavisa.com/canada-i...1-citizenship-applicants.740188/post-10217822
SCR office