;"Friday, 16 of May";"Thursday, 15 of May";"average on Friday";"average for 7 days"
"Visitors during 31 days";11;11;3.2;7.9
"Visitors during 7 days";11;11;3.2;7.9
"Visitors during a day";4;5;1.2;3.9
"New (or were not present during 31 days)";0;1;0;1.3
"Continual (present every day during a week)";1;1;0.25;0.43