Fix Infrequent Polling sample #501

Job	Run time
build-lint-test (3.8, ubuntu-latest)	3m 18s
build-lint-test (3.8, macos-intel)	3m 45s
build-lint-test (3.8, windows-latest)	4m 6s
build-lint-test (3.12, ubuntu-latest)	3m 46s
build-lint-test (3.12, macos-intel)	4m 19s
build-lint-test (3.12, macos-arm)	3m 34s
build-lint-test (3.12, windows-latest)	4m 17s
	27m 5s

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