Answered By: Lippincott Library Last Updated: Oct 20, 2016 Views: 42
Data.gov is one place to start. This is a large open repository for data where you can search for "frequency of", "number of" or "count of" and then filter with categories on the left side of the page.
AWS Public Data Sets (http://aws.amazon.com/datasets/)
UC Irvine Machine Learning Repository (http://archive.ics.uci.edu/ml/)
European Union Open Data Portal (http://open-data.europa.eu/en/data/)