AcclaimIP calculates a piece of meta data for the Event Code sub-record for each patent - the count.  Use the ANA_LGL_CT field to query the number of listed legal events for each patent.  The ANA_LGL_CT field is most often used in a range query.

Example:

ANA_LGL_CT:[10 to *]  -->  Finds patents with 10 or more legal events registered.

ANA_LGL_CT:[5 to *] AND LGL_CODE:FPAY --> Finds patents with 5 or more legal events registered where at least one of those is the legal event code showing fee payment.