to one's heart's content; fully; without restraint — doing something as much as one likes or to full satisfaction.
休みの日は家で本を存分に読む。
On my days off I read books to my heart's content at home.
彼は自分の能力を存分に発揮した。
He fully demonstrated his abilities.
どうぞ私たちのおもてなしを存分に受けてください。
Please accept our hospitality to the fullest.
その地方の名物料理を存分に味わった。
I enjoyed the local specialty dishes to my heart's content.