This Halacha is an excerpt from our Sefer
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What is the law if one made a mistake in either the weeks or days, but said one of them correctly?
If one made a mistake and said the wrong number calculation of week or days, then it is considered as if he did not mention at all the mistaken part, and follows the laws stated above regarding one who only counted weeks or days. [Thus, for example, if on the 15th day he said “Today is 14 days, which is two weeks and two days to the Omer”, he fulfills his obligation. If, however, on the 14th day he said “Today is 15 days, which is two weeks of the Omer” he does not fulfill his obligation.]
 Shoel Umeishiv Mahdurah Daled 3/127; Kinyan torah 3/105; Mishneh Halachos 8/192; Shraga Hameir 4/62; Piskeiy Teshuvos 489/9
 The novelty here is that we do not disqualify the entire count due to the mistaken section. [ibid]