Then you could traverse the string and, for each character, increment the corresponding counter, probably using a chained conditional.

然后你遍历整个字符串，每个字母的个数都累加到对应的计数器里面，可能会用到分支条件判断。

youdao

Pay-off strand, stranding cartage, compact die stand, counter meter, double draught wheels, take up and traverse device, mechanical transmission system and electrical control system.

放线架、各段绞笼体、线模座、计米装置、双轮牵引装置、收排线架、传动系统和电控系统。

youdao