How are Query Suggestions Generated for On-Prem Coveo
What are the requirements for query suggestions to be generated for the on-prem version of Coveo? Are suggestions still generated only once a day even though we're not using the "cloud" version?
Coveo for Sitecore:
Have a look at the edition feature chart. On-Premises Coveo does not offer query suggestions, but you can still use Usage Analytics suggestions, even tough they are not as relevant as Coveo ML suggestions (available Cloud only).
You can enable these suggestions in your search component properties. This article explains the differences between the types of query suggestions.
Requirements for UA suggestions are explained in the articles.
Let me know if you need more precisions.