update count_occuerence method

[sahasrara62]

use default method to get the occurrence of the value in a list. this method automatically handle all the condition of the value.

Description

Resolves #(issue number)

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• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] Enhancement (non-breaking improvement of a snippet)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have checked that the changes are working properly
• [ ] I have checked that there isn't any PR doing the same
• [ ] I have read the CONTRIBUTING document.

[sahasrara62]

but python method used there are really too bad.

[Chalarangelo]

Please read the contribution guidelines for submitting and updating snippets.

[lock[bot]]

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