+-------+---------------------+------+-----+---------+----------------+
| Field | Type                | Null | Key | Default | Extra          |
+-------+---------------------+------+-----+---------+----------------+
| id    | int(11) unsigned    | NO   | PRI | NULL    | auto_increment |
| ngram | varchar(64)         | NO   | UNI |         |                |
| count | bigint(20) unsigned | NO   | MUL | NULL    |                |
+-------+---------------------+------+-----+---------+----------------+

LOAD DATA INFILE 'vocab' INTO TABLE ngrams_copy FIELDS TERMINATED BY 't' LINES TERMINATED BY 'n' (ngram, count)

Row 9558923 doesn't contain data for all columns