You might be confusing the word weekly with weakly. These words are commonly misused.

Word parts change

week + -ly

Pronunciation change

Noun change

Singular
weekly

Plural
weeklies

  1. (countable) A weekly is a magazine or newspaper that you get once a week.

Adjective change

Positive
weekly

Comparative
none

Superlative
none

  1. If something happens weekly, it happens once a week.