I don’t think he is quite correct. See this:
Catholics in the United States and Canada (and other countries where Corpus Christi is transferred to Sunday) do not often get the opportunity to celebrate the 10th Sunday in Ordinary Time for entirely calendrical reasons. The necessity of preceding Advent with the 34th week in Ordinary Time requires the arrangement of the previous weeks in Ordinary Time to accommodate this progression. Depending on the relationship between the date of Easter and the date of the 1st Sunday of Advent, the week in Ordinary Time after the Easter Season can range between the 6th and 12th. But three Sundays that fall within those weeks in Ordinary Time are superseded by Solemnities: Pentecost, Trinity Sunday, and Corpus Christi. If, as happened here this year, the Monday after the Easter Season belongs to 8th week in Ordinary Time (i.e., Pentecost replaces the 8th Sunday), then Trinity Sunday replaces the 9th Sunday, and Corpus Christi replaces the 10th. In order for the 10th Sunday in Ordinary Time to be celebrated in countries such as the United States and Canada, post-Easter Ordinary Time cannot begin in the 8th, 9th, or 10th weeks. As this chart shows, however, this happens more often than not (57 occurrences in the 80 year period between 1970 and 2050). Presuming the transfer of Corpus Christi, in the 80 years beginning with the introduction of the three-year lectionary, there are 22 celebrations of the 10th Sunday in Ordinary Time. Of these instances, only 6 occur in Cycle B: 1970, 1973, 1991, 1997, 2018, and 2024. When Mark 3:20-35 is next read during a Sunday Mass, it will have been 21 years since it was previously read.
