Perform a Pareto analysis on the following information gathered from customer surveys at a hotel.

Reason for unsatisfying stay at hotel

Frequency

Unfriendly staff

$6$

Room not clean

$2$

Room not ready at check$-$in

$3$

No towels at pool

$33$

No blanket for pull$-$out sofa

$4$

Pool water too cold

$3$

Breakfast of poor quality

$16$

Elevator too slow or not working

$23$

Took too long to register

$7$

Bill incorrect

$3$

Total

$100$

Examining this Pareto analysis, the greatest source of dissatisfaction is:

Took too long to register

No towels at pool

Breakfast of poor quality

Unfriendly staff

Elevator too slow or not working