The schwa sound is represented by the symbol /ə/ and it is a very common sound in English. It's a short, unstressed vowel sound that often occurs in unstressed syllables.
In "confidence," the schwa sound is in the second syllable, "fi":
* con /kɑːn/
* fi /ə/
* dence /dɛns/
Therefore, the schwa sound is present in the word "confidence".