Meaning of the word "in times of prosperity, friends will be plenty; in times of adversity, not one in twenty" in English

What does "in times of prosperity, friends will be plenty; in times of adversity, not one in twenty" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

in times of prosperity, friends will be plenty; in times of adversity, not one in twenty

US /ɪn ˈtaɪmz əv prɑːˈsper.ə.ti ˌfrendz wɪl bi ˈplen.ti ɪn ˈtaɪmz əv ædˈvɜːr.sə.ti nɑt ˌwʌn ɪn ˈtwen.ti/
"in times of prosperity, friends will be plenty; in times of adversity, not one in twenty" picture
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