I wonder if it would be legal/practical for the email hosting company, Google in this case, to provide the data satisfying the subpoena in the form of a word cl

I wonder if it would be legal/practical for the email hosting company, Google in this case, to provide the data satisfying the subpoena in the form of a word cloud. Once the law enforcement party has that information in hand they can search the word cloud for interesting words and potential phrases and make a secondary request for the email provider to surrender all occurrences of the suspicious words and phrases in order to establish the context of their use in the subpoenaed communications. This would provide an enhanced degree of privacy to the user since there would not be a bulk surrender of every conversation they've had during the time period covered by the subpoena. I have a hard time seeing why it is important for the government to grab everything when their target is well known to them and the medium they are searching is likely to be text-based and therefore all targeted communications are easily separable at the email provider end.