To be able to express something like $10.00/hour for a baseSalary through MonetaryAmount

Add unitCode and unitText (if can't provide a unitCode value/URL)

Examples:

"The base salary amount is $10.00/hr"

"amount": {
"@type": "MonetaryAmount",
"currency": "USD",
"value": "10",
"unitCode": "HUR"
}

or

"€2000 every other Friday"

"amount": {
"@type": "MonetaryAmount",
"currency": "EUR",
"value": "2000",
"unitText": "Every other Friday"
}