Possible Clues:

• It's not unusually round 12 in here
• ''... in the stilly night'' (Moore melody)
• Poet's frequently
• "Our remedies __ in ourselves do lie": "All's Well That Ends Well"
• Often, to Old English lyricist
• Frequently, in romantic poetry
• '___ I had heard of Lucy Gray': Wordsworth
• Far from seldom, to Shakespeare
• ' ... in the stilly night' (Moore)
• T's frequency