We can generate a histogram for the reporting date attribute with the following two lines:

ggplot(data = cash_flow_report,aes(y))+
geom_histogram(stat = 'count')

Which produces a quite...ehm...rectangular histogram:

Well, thinking a bit about it, it is actually a reassuring output: it shows us that all dates are recorded an equal number of times, and therefore that there is no missing record. We perform a final check on this looking at the sequence on the x axis: is there any date missing? No, so we can move on to the geographical area.