11.   She sat in the dishevelled shabby glamour of her bedroom and stared out of the window for hours at a time.

12.   Shrimp boats can trawl continuously for hours at a time.

13.   Standing in line for hours at some government office was not exactly my idea of fun.

14.   Still others petition for improved playgrounds in their town and extended hours at their local library.

15.   The new job means more hours at work, which makes it harder for me to see my kids.

16.   The systems usually involved staring for hours at charts showing the history of bond prices.

17.   They kept us hanging around for hours at the hospital.

18.   We had around for hours at the airport while the plane ready for take-off.

19.   She has an amazing ability to focus for hours at a time.