Depending on the method of preparation, defrosting may be suggested. 1  Allow 12 to 24 hours to defrost steaks, depending on thickness.  Allow 4 to 7 hours per pound to defrost large roasts or thick compact pot roasts.
A myth has emerged that none always requires a singular verb. Not true. The word none can take the singular or the plural. In the words of New Fowler: It is a mistake to suppose that the pronoun [none] is singular only and must at all costs be followed by singular verbs or pronouns . . . . At all times since the reign of King Alfred the choice of plural or singular . . . has been governed by the surrounding words or by the notional sense. New Fowler, p. 526.
Because 'none' has a 'singular' basic meaning, it is easy to think that it should always be followed by a singular verb, e.g. None of us is perfect.. However, in the English language, for over a thousand years, none has been used with both singular and plural verb forms! In fact, when the meaning is not any persons or things (see example above), the plural form is much more usual, i.e.