How Many Times
How Often
adverb, noun
How many occurences is just another way of asking how many times.
This word is more literary and formal than 何回 or 何度.
The reading is a combination of kun'yomi and on'yomi readings. That being said, both readings for both kanji are the readings you learned with the kanji so you should be able to read this.
彼は、幾度失敗しても、諦めなかった。
Even though he failed many times, he didn't give up.
幾度も幾度も人類は同じ間違いをくり返してきた。
Countless times, humanity has repeated the same mistakes.
その時の君のか細い笑顔を幾度となく思い出しては、僕は存在というもののはかなさと美しさについて、深く考える。
I keep recalling your fragile smile from that moment, and I deeply reflect on the fleeting and beautiful nature of existence.
幾度となく同じ道を歩んできたように思える。そして、その道は、いつも遠くのどこか、しかしこれもまた同じ風景へと続いていた。
It feels as though I've walked the same path countless times. And that path always seemed to lead somewhere distant, yet it continued toward the same landscape.