This is the 4932nd most frequent Polish word.
planowania
"Planowania" means "planning" in English.
Here, 'planowania' is used as the noun form derived from the verb 'planować', placed in the genitive case to describe the process being discussed.
Proces planowania jest kluczowy dla sukcesu projektu.
The process of planning is crucial for the success of the project.
In this sentence, 'planowania' is again a noun in the genitive case, signifying the descriptive link to 'koszty' (costs).
Koszty planowania przekroczyły pierwotne założenia.
The costs of planning exceeded the original assumptions.
Usage of 'planowania' here reflects the ability associated with the act of planning, fulfilling its grammatical and semantic role as a gerund.