Here is a handy plugin that lets you limit the number of posts / post types a user can create. User Posts Limit for WordPress is pretty easy to use. Simply select role and post type, and you are ready to limit post creation (daily to yearly or forever).
You can change type, cycle, and other settings in the back-end. You can also track how many posts each user has left of their quota. User Posts Limit offers integration with Paid Memberships Pro, WooCommerce, and Restrict Content Pro. Admins have the option to hide content when post limits are exceeded.