This is the 15339th most frequent Polish word.
składał
"Składał" means "he/she/it was folding, assembling, or submitting."
In this sentence, 'składał' is used in the sense of 'assembling' or 'putting together', referring to constructing models.
Michał składał modele samolotów w swoim wolnym czasie.
Michał was assembling model airplanes in his free time.
Here, 'składał' means 'giving greetings' or 'extending wishes', denoting the act of expressing good wishes.
Janek składał życzenia urodzinowe swojej cioci.
Janek gave birthday wishes to his aunt.
In this context, 'składał' is used as 'submitting' or 'handing in', referring to providing documents formally.