Examples:

• Yes, well, not in a month of Sundays, Mr Greene.
• Girl, I have not seen you in a month of Sundays.
• Uh, you know, it's just been a month of Sundays.
• He wouldn't turn up here in a month of Sundays.
• He wouldn't turn up here in a month of Sundays.
• Never in a month of Sundays.
• He wouldn't turn up here in a month of Sundays.
• I'm happier than a preacher in a month of Sundays.
• I feel like I've had a month of Sundays.
• I haven't eaten like this for a month of Sundays.