Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_27374004_4 (date_of_vacancy VARCHAR, outgoing_manager VARCHAR)
### Question:
How many times did outgoing manager Bart de Roover vacated a position?
### Answer:
SELECT COUNT(date_of_vacancy) FROM table_27374004_4 WHERE outgoing_manager = "Bart De Roover"