What is the amoun of marginal ordinary income tax rate where married filing jointly or qualified widow is $208,851–$372,950?
CREATE TABLE "regular_and_capital_gains_tax_rates_for_" (
  "marginal_ordinary_income_tax_rate" text,
  "single" text,
  "married_filing_jointly_or_qualified_widow_er" text,
  "married_filing_separately" text,
  "head_of_household" text
);
SELECT COUNT("marginal_ordinary_income_tax_rate") FROM "regular_and_capital_gains_tax_rates_for_" WHERE "married_filing_jointly_or_qualified_widow_er"='$208,851–$372,950';