It appears that the present-day form of African American English is not the inheritance of the period of slavery, but the creation of the second half of the 20th century.
“Sometimes I don't even pull my shoes off for six weeks at a time, except, you know, just to take a shower. I just take breaks between 24 hours a day, just a break now and then, it don't take me long to rest; maybe 20 to30 minutes sometime, or maybe an hour.”