multiplicity
noun /ˌmʌltɪˈplɪsəti/
  /ˌmʌltɪˈplɪsəti/
[singular, uncountable] (formal)- a great number and variety of something- This situation can be influenced by a multiplicity of different factors.
 Word Originlate Middle English: from late Latin multiplicitas, from Latin multiplex ‘multiple’.