just want to understand the logic behind the wording being used....

for you exactly how many would it need to be to quantify as "that many"?

say it wasn't 10+million (see) and only 300K (the number mentioned in another reply)....300K isn't a lot (enough)?

for grins, consider the comparison to the population of Europeans who came over

check this:

Over the period of the Atlantic Slave Trade, from approximately 1526 to 1867, some 12.5 million slaves had been shipped from Africa, and 10.7 million had arrived in the Americas. The Atlantic Slave Trade was likely the most costly in human life of all of long-distance global migrations.

The first Africans forced to work in the New World left from Europe at the beginning of the sixteenth century, not from Africa. The first slave voyage direct from Africa to the Americas probably sailed in 1526.

The volume of slaves carried off from Africa reached thirty thousand per year in the 1690s and eighty-five thousand per year a century later. More than eight out of ten Africans forced into the slave trade made their journeys in the century and a half after 1700.

By 1820, nearly four Africans for every one European had crossed the Atlantic. About four out of every five females that traversed the Atlantic were from Africa.

The majority of enslaved Africans were brought to British North America between 1720 and 1780. The decade 1821 to 1830 still saw over 80,000 people a year leaving Africa in slave ships. Well over a million more – one tenth of the volume carried off in the slave trade era – followed within the next twenty years.

Africans carried to Brazil came overwhelmingly from Angola. Africans carried to North America, including the Caribbean, left from mainly West Africa.

Well over 90 percent of enslaved Africans were imported into the Caribbean and South America. Only about 6 percent of African captives were sent directly to British North America. Yet by 1825, the US had a quarter of blacks in the New World."

source: https://www.gilderlehrman.org/history-by-era/slavery-and-anti-slavery/resources/facts-about-slave-trade-and-slavery