Sabr is form of shukr also.
When we loose something or don't get something or can't do anything about a circumstance, if we remain patient and thank Allah for counting blessings instead of getting upset over it is shukr too.
Like belief must be mainifested by tonge and action, sabr must reflect in speech and in action.
Its about time for putting it to action.
Thankfulness comes from happiness and contentment.
If someone is not happy with what it gets will not be truly thankful. One who is not content with its provisions will not thank for what it has. it will instead greed for more and more and ....