Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_13998897_1 ( height_m___ft__ VARCHAR, frequency_mhz VARCHAR )

### Question ###
how many height m ( ft ) with frequency mhz being 100.1

### Accurate SQL ###

SELECT COUNT(height_m___ft__) FROM table_13998897_1 WHERE frequency_mhz = "100.1"