I advise you to follow the following databases of single nucleotide polymorphisms (SNPs) and multiple small-scale variations that include insertions/deletions, microsatellites, and non-polymorphic variants. You will find all the related data you search about including the minor allele frequency (MAF) for every SNP.

https://www.ncbi.nlm.nih.gov/snp/

https://www.snpedia.com

I agree with the submission of Ali

I also use a database called gnomad which is useful for mutation frequencies.

http://gnomad.broadinstitute.org

Dear researchers

Thank you all for taking your precious time for answering my question.

Best regard

Amir Mehrgou