2 Sentences With "twelve hundred hours"

How to use twelve hundred hours in a sentence? Find typical usage patterns (collocations)/phrases/context for "twelve hundred hours" and check conjugation/comparative form for "twelve hundred hours". Mastering all the usages of "twelve hundred hours" from sentence examples published by news publications.

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They cannot understand it. Therefore they say it is meaningless. Now if it were meaningless it could be written quickly without thought, without pains, without erudition; but I assure you that these 20 pages now before us [i.e. chapter I.8] cost me twelve hundred hours and an enormous expense of spirit.
"'The Infinite Way' is not a religion... but an experience in spiritual living. There is no organization, no structure, no rules, no church buildings, no congregation, no dues, and no bureaucracy. (There are no rituals, strict dogmas, or prescriptive practices.) 'The Infinite Way' Message is composed solely of the inspired works of Joel Goldsmith based on his revelations and experiences: the more than fifty-one books he authored, and the more than twelve hundred hours of his lectures and classes."Covell, O.D. (2005) Taking the Path to Spiritual Awakening. AuthorHouse.