Understand query frequency/churn

Divide time periods into 28 day periods

For all queries within each 28 day time period

Count number of days that query appeared.

Provide visual by day count (e.g. number that appeared 1 day, 2 days, etc)

Display average position, impressions, clicks for each day bucket

Show what % of queries in each day bucket - existed in prior period at higher frequency, prior period lower frequency, same frequency, no frequency.

Calculate a query churn rate.