Insight currently does not offer a freetext search in the objects' history. But you can add this as a feature request to our developers in https://jira.riada.io
Having said that, you can send a REST call to Insight and get the objects' History. In that sense, you can search in the resulted data using the REST solution.
Please check this : https://confluence.atlassian.com/jirasoftwarecloud/advanced-searching-fields-reference-764478339.html
Navigate down to "Enviroment" section as this could be the solution to your problem.