There are twelve cantos, three hundred thirty-five chapters and eighteen thousand verses in Srimad Bhagavatam

Expressions researched:
"twelve cantos, 335 chapters and eighteen thousand verses"

CC Madhya-lila

Śri Caitanya Mahāprabhu quoted Garuḍa Purāṇa: "'Śrīmad-Bhāgavatam is the supreme Purāṇa, and it was compiled by the Supreme Personality of Godhead in His incarnation as Vyāsadeva. There are twelve cantos, 335 chapters and eighteen thousand verses.'"

CC Madhya 25.143-144, Translation and Purport:

"'The meaning of the Vedānta-sūtra is present in Śrīmad-Bhāgavatam. The full purport of the Mahābhārata is also there. The commentary of the Brahma-gāyatrī is also there and fully expanded with all Vedic knowledge. Śrīmad-Bhāgavatam is the supreme Purāṇa, and it was compiled by the Supreme Personality of Godhead in His incarnation as Vyāsadeva. There are twelve cantos, 335 chapters and eighteen thousand verses.'"

This is a quotation from the Garuḍa Purāṇa.