What is the frequency of the model whose part number is ado520biaa5do? 
CREATE TABLE table_13869651_3 (frequency VARCHAR, part_number_s_ VARCHAR)
SELECT frequency FROM table_13869651_3 WHERE part_number_s_ = "ADO520BIAA5DO"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_13869651_3 (frequency VARCHAR, part_number_s_ VARCHAR) Question: What is the frequency of the model whose part number is ado520biaa5do?  [/INST] SELECT frequency FROM table_13869651_3 WHERE part_number_s_ = "ADO520BIAA5DO" </s>