This is the 13607th most frequent Polish word.
planował
"Planował" means "he was planning" or "he planned."
The word 'planował' here is used to indicate an intention or plan that Piotr had for future actions.
Piotr planował spędzić wakacje nad morzem.
Piotr planned to spend the holidays at the seaside.
In this sentence, 'planowała' conveys an ongoing process in the past regarding Maria's career strategy.
Maria długo planowała swoją karierę zawodową.
Maria had been planning her professional career for a long time.
Here, 'planował' shows an intended action that did not take place as expected due to the second clause.