Swim has got Safrole crystals to freeze out in 4 days after scratching the bottom of the beaker with a glass rod. I believe this is called "Seeding". Whether you freeze out the Safrole or not you are still going to need a good form of vacuum further down the track. Swim has been able to achieve a vacuum of ~18mm/hg using the aspirator station mentioned at Rhodiums as long as the reservoir was filled with large chunks of ice.
https://www.thevespiary.org/rhodium/Rhodium/chemistry/equipment/aspirator.html (https://www.thevespiary.org/rhodium/Rhodium/chemistry/equipment/aspirator.html)