Aggregates the count of full working days within a week and normalizes it.
simple_td(dates, df.td)
Arguments
dates: a vector of class "Date", containing the data dates
df.td: dataframe with working days. Its should consit of 2 columns named as "date" and "WORKING_DAY_PART". date column should be of class "Date". WORKING_DAY_PART should be similar to ISR_WORKING_DAY_PART in dates_il