31.   Though Massachusetts had abolished slavery, many slaves stayed on as servants under contract.

v. + slavery >>共 102
abolish 13.14%
end 6.78%
condemn 3.81%
escape 3.81%
justify 3.39%
outlaw 3.39%
have 2.54%
discuss 2.12%
condone 2.12%
defend 2.12%
abolish + n. >>共 316
law 3.79%
tax 3.61%
control 3.35%
program 2.90%
slavery 2.73%
system 2.55%
agency 2.46%
monarchy 2.46%
post 2.38%
requirement 1.94%
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