Rest Assured JsonPath Counting

How can i count using JsonPath? See this json -

[
{
"total": 4414,
"userName": "Tom",
},
{
"total": 6608,
"userName": "Jerry",
},
{
"total": 5,
"userName": "Tom",
}
]

I want to count userName "Tom" so the answer will be 2 and counting "Jerry" will produce 1

Running the following says i have the value inside but how much of it.

assertThat(jsonPath.getList("userName", String.class), hasItem("Tom"));

Running this says the size of the list but the list may contain other values than "Tom", Like "Jerry"

assertThat(jsonPath.getInt("size()"), equalTo(3));

is this can be answered within JsonPath or i must use FOR, LOOPS, else ?