Retrieve purchase rate

Retrieves the purchase rate for all your searches with at least one purchase event, including a daily breakdown. By default, the analyzed period includes the last eight days including the current day. The rate is the number of purchase conversion events divided by the number of tracked searches. A search is tracked if it returns a query ID (`clickAnalytics` is `true`). This differs from the response's `count`, which shows the overall number of searches, including those where `clickAnalytics...