noun
BAD : I greatly appreciate all your help and guidances.
GOOD : I greatly appreciate all your help and guidance.
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Guidance is an uncountable noun: 'The council provides guidance and support for students wishing to study abroad.'
noun
BAD : I greatly appreciate all your help and guidances.
GOOD : I greatly appreciate all your help and guidance.
◆◆◆
Guidance is an uncountable noun: 'The council provides guidance and support for students wishing to study abroad.'
Longman Common Errors English vocabulary. Английский словарь распространенных ошибок Longman. 2012