sickness calander - counting repeated days

hello all,

new here and have been looking through the forums to see if there was something similar to the problem i am having. i have a calander (see attached) and i wish to count the number of occurances (sickness) an individual has off over a year period, but looking at those particular days they have off as sick - how many mondays they have off or how many fridays they have off.

would also be nice to count number of days since their last sickness days away from work.

anyhelp would be appreciated.

thanks

sanderosa.