1. An apparatus for extracting a time series pattern, comprising: a data storage unit configured to store a first time series data including a plurality of element sets, each element set including numeric data and text data; a numeric key concept extraction unit configured to extract a numeric key concept of the numeric data from each element set of the first time series data; a text key concept extraction unit configured to extract a text key concept of the text data from each element set of the first time series data; a generation unit configured to generate a second time series data including a plurality of element sets, each element set including the numeric key concept and the text key concept; a calculation unit configured to calculate a support from the plurality of element sets of the second time series data, the support being a degree belonging to the numeric key concept or the text key concept; and a time series pattern extraction unit configured to extract a frequent time series pattern from the second time series data by referring to the support, the frequent time series pattern being at least one combination of each numeric key concept and each text key concept.