Table schema:
CREATE TABLE table_1341663_26 (incumbent VARCHAR, candidates VARCHAR)

Question: How many times was the candidates dick gephardt (d) 81.9% lee buchschacher (r) 18.1%?
SQL: SELECT COUNT(incumbent) FROM table_1341663_26 WHERE candidates = "Dick Gephardt (D) 81.9% Lee Buchschacher (R) 18.1%"