diff --git a/inst/exdata/serviceC_usage.csv b/inst/exdata/serviceC_usage.csv
new file mode 100644
index 0000000..92cefee
--- /dev/null
+++ b/inst/exdata/serviceC_usage.csv
@@ -0,0 +1,23 @@
+date,nb_visits,nb_actions
+2019-01-01,7870,12190
+2019-02-01,7171,12031
+2019-03-01,6951,12418
+2019-04-01,6031,10762
+2019-05-01,5733,10788
+2019-06-01,6589,187172
+2019-07-01,9863,24742
+2019-08-01,5330,12063
+2019-09-01,5567,8971
+2019-10-01,6811,10720
+2019-11-01,9792,15290
+2019-12-01,5304,8905
+2020-01-01,7961,95210
+2020-02-01,5787,9795
+2020-03-01,7150,91973
+2020-04-01,8143,339520
+2020-05-01,8130,261307
+2020-06-01,6867,10302
+2020-07-01,7575,12347
+2020-08-01,4786,8157
+2020-09-01,6837,11147
+2020-10-01,6775,9916