"monthly procedure" is correct and usable in written English.
You can use this term to refer to a task or activity that is done on a regular monthly basis. For example, "The company has implemented a new monthly procedure for reviewing customer feedback."
Children were identified through regular monthly audit procedures, and an invitation letter was sent to their guardians.
The air conditioners were chosen according to the local representative of Natural Technologies Italia srl, by evaluating the similarity of their technical and structural features and making sure that routine 6-monthly maintenance procedures, based on the use of an alcool-based detergent, were not underway.
All patients were reviewed in clinic monthly after the procedure for the first 3 months and then followed up every 6 months.
During the 15 months of enrolment, which coincided with changes in the national reimbursement procedures, monthly enrolment varied from 11 to 45 patients per month.
Routine procedures included monthly weighing of all cattle, one pre-inoculation and then monthly blood sampling from 1 month post inoculation (mpi) of inoculated cattle until 13 mpi when routine blood sampling was discontinued to prevent stress during sampling and enable comparison of the clinical presentation with the control cattle, which were not sampled.
After mink were habituated to feeding from each height, food was delivered onto all heights and feeding observed, a procedure repeated monthly until animals were adult body length (at 7 months old).
Market prices were estimated on a monthly basis using the procedure outlined above.
All others must be reviewed again according to the new procedures, and monthly progress reports must be sent to the agency.
