How many rare words are there in Chinese characters?

this is really a difficult question to answer, and it may be unprofessional. It's for reference only! According to The Sea of Chinese Characters by Leng Yulong and others in 1994, there are as many as 85, uncommon characters, but most of the Chinese characters included in this book are "dead characters", that is, words that have existed in history but have been abandoned in today's written language. These words are all rare words. Examples of uncommon words: product bēn 獇 product biāo 獇 product biāo 傄 product cū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū 踋 ⅸ fire 烓炠炠 fire 歺 fire 炾 fire 炾 kūn ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū ū 36 ǒu ǒ ǒ 뙊 뙊 뙊 뙊 뙊 뙊 뙊 뙊 뙊 뙊 뙊 뙊 뙊 ሺ ሺ 뙊 뙊 뙊 뙊 뙊 뙊 뙊񱻪4 Uān 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 昨 Hán Shuishi Shuiqi ā n Shuiy ú n Shuishi Shuishi Yying Shuishi Yying Shuimi Shuishi wù ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē ē Wū Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž Ž 3 Li Zhen Zhe Kou Zhen 棽 Mu chēn 燊 Mu shēn 甙 Page Xi M: n Shan Yao 両 Li M: ng 燊燊燊燊燊 (the same as "hi") Bi Ao Ji Ao concrete tóng.