I have a feeling Patchy guessed Remilia would cut time down. She can do it in month but if she would have said "give me a month" Remilia would have demanded it in a week.
EDIT: In next page Patchy demands to be given three months.
One m-...!I misspoke. I apologize.Let me see...Remy, Remilia.Even if no one else in the world believes...Patchy.Remilia Scarlet! You......I understand....I believe in you and your magic.The purple-haired witch, Patchouli Knowledge.Could you give me at least half a year?Too slow.
Do it in one month.