FIRSTLY, Always preceed the time frame with a digit, that is
do not write the number in letters,
SECONDLY, always add space after the number,
LASTLY, the first letter of the timeframe should be in CAPS and always add 's' to the
timeframe even if your duration is just a day, month or year.
Eg, 1 Days, 3 Weeks, 1 Hours, 48 Hours, 4 Months, 1 Years, 9
Months