We divide 644139 by 60
The aim is to understand the frequency of 60 in 644139.

Step 1:
The number 60 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 60

Let's proceed to step 2:
If we divide 64 by 60, we get 1 and a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 60 from 64 to get 4.
Include the next digit (4) from the dividend after 4, then repeat: 44 / 60

Moving on to step 3:
60 can be fit into 44 0 times, resulting in a remainder of 44.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtract 0 from 44 to get 44.
Grab the next digit (1) from the dividend, add it to 44, then carry on: 441 / 60

Step 4:
60 goes into 441 7 times with a remainder of 21.
Record the quotient 7 as the next digit in the result. 
Result so far: 107.0
Deduct 420 from 441 and we're left with 21.
Grab the next digit (3) from the dividend, add it to 21, then carry on: 213 / 60

Advancing to step 5:
The number 60 fits into 213 3 times, leaving a remainder of 33.
The number 3 becomes the next digit in our result. 
Result so far: 1073.0
If we subtract 180 from 213, we get 33.
Bring next digit (9) of the dividend behind the 33 and repeat the process: 339 / 60

Moving on to step 6:
60 goes into 339 5 times with a remainder of 39.
Put 5 as the next digit of the answer. 
Result so far: 10735.0
If we take 300 away from 339, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 7:
390 divided by 60 is 6 with a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 10735.6
Subtract 360 from 390 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
60 goes into 300 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 10735.65
If we take 300 away from 300, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
60 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10735.65
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
If we divide 0 by 60, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10735.65
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 10735.65, and the remainder is 0.0.