How to convert integers to numbers of months

Dear all,

 

Thank you once again, as usual i got code tips from you guys today after implementing it, this solve part of my challenges now i want to convert list of duration to duration in months

 

Duration (int)	Number of Months
30	1 month
90	3 months
60	2 months
120	4 months

 

the script is shown below

 

 i want the duration to be in number of months as in the table above.

 

thank you all