David Cameron turned to his wife Samantha's diary after being asked at the Leveson Inquiry into press standards how often he socialised with Rebekah Brooks and her husband, Charlie.
The Prime Minister gave a "rather vague" answer when asked - in the morning session - how often the Camerons and the Brooks met.
He was able to provide more detail - following a lunch break - after checking Mrs Cameron's diary.
"I gave a rather vague answer about the issue of social contact between myself, my wife and Rebekah and Charlie Brooks," Mr Cameron told the inquiry.
"Mrs Cameron keeps a rather better weekend diary than I do."
He said his wife's diary suggested that the Camerons were "in the constituency" for 23 weekends in 2008 and 2009 and 15 in 2010.
Cameron added: "We probably did not see them more than once every six weeks."
Lord Justice Leveson told him: "The great value of wives, Prime Minister."Suggest a correction