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Given the following text description, write Python code to implement the functionality described below step by step
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Description:
 monocultural--1973, 1978, 1985 
monoethnic -- 2008 --plateaus, increases slightly in current year.
Step1:  bicultural
Step2:  mixed race
Step3:  polyculturalism has no frequency in NYT
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Python Code:
words = ['biracial', 'biethnic', 'bicultural', 'interracial']
plot(words)
_ = plt.xlim(1890, 2015)
_ = plt.ylim(10e-7, 10e-2)
savefig('NYT2.png')
Explanation: monocultural--1973, 1978, 1985 
monoethnic -- 2008 --plateaus, increases slightly in current year.
End of explanation
words = ['mixed race', 'mixed ethnicity', 'other race', 'other ethnicity']
plot(words)
_ = plt.ylim(2e-4, 3e-1)
savefig('NYT3.png')
Explanation: bicultural: starts 1920-1940 (spike in 1930); starts again in 1950
biethnic: small plateau in 1995-2005
End of explanation
words = ['multiracial', 'multiethnic', 'multicultural', 'polyracial', 'polyethnic', 'polycultural']
plot(words)
_ = plt.xlim(1950, 2015)
_ = plt.ylim(1e-4, 3e-1)
savefig('NYT4.png')
words = ['multiculturalism', 'polyculturalism', 'cultural pluralism']
plot(words)
_ = plt.xlim(1920, 2015)
_ = plt.ylim(3e-4, 3e-1)
savefig('NYT5.png')
Explanation: mixed race: dips in 1950
mixed ethnicity: 1985 upward
other ethnicity: 1990 upward
End of explanation
words = ['monocultural', 'bicultural', 'interracial','multiracial', 'multicultural','mixed race']
plot(words)
_ = plt.ylim(3e-4, 3e-1)
savefig('NYT6.png')
Explanation: polyculturalism has no frequency in NYT
End of explanation
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