;"Thursday, 22 of May";"Wednesday, 21 of May";"average on Thursday";"average for 7 days"
"Visitors during 31 days";13;?;16;13
"Visitors during 7 days";10;?;9.2;10
"Visitors during a day";4;?;3.2;4
"Continual (present every day during a week)";1;?;0.25;1
"Main body (present every week during a month)";0;?;1;0