61391061 divided by 504 
The aim is to understand the frequency of 504 in 61391061.

On to step 1:
504 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 504

Going ahead to step 2:
504 goes into 61 0 times with a remainder of 61.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 61 to get 61.
Take the next digit (3) from the dividend and append it to 61, then repeat: 613 / 504

On to step 3:
504 goes into 613 1 times with a remainder of 109.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 504 from 613 leaves us with 109.
Include the next digit (9) from the dividend after 109, then repeat: 1099 / 504

Step 4:
504 goes into 1099 2 times with a remainder of 91.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtract 1008 from 1099 to get 91.
Fetch the next digit (1) from the dividend, attach it to 91 and continue: 911 / 504

Advancing to step 5:
If we divide 911 by 504, we get 1 and a remainder of 407.
Record the quotient 1 as the next digit in the result. 
Result so far: 121.0
The remainder is 407 after subtracting 504 from 911.
Take the next digit (0) from the dividend and append it to 407, then repeat: 4070 / 504

Going ahead to step 6:
504 goes into 4070 8 times with a remainder of 38.
Record the quotient 8 as the next digit in the result. 
Result so far: 1218.0
Subtract 4032 from 4070 to get 38.
Take the next digit (6) from the dividend and append it to 38, then repeat: 386 / 504

Advancing to step 7:
504 can be fit into 386 0 times, resulting in a remainder of 386.
Record the quotient 0 as the next digit in the result. 
Result so far: 12180.0
Subtract 0 from 386 to get 386.
Take the next digit (1) from the dividend and append it to 386, then repeat: 3861 / 504

On to step 8:
504 can be fit into 3861 7 times, resulting in a remainder of 333.
Put 7 as the next digit of the answer. 
Result so far: 121807.0
The remainder is 333 after subtracting 3528 from 3861.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3330, and continue the process.

Step 9:
The number 504 fits into 3330 6 times, leaving a remainder of 306.
Write down 6 as next digit of the result. 
Result so far: 121807.6
Subtracting 3024 from 3330 leaves us with 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Going ahead to step 10:
If we divide 3060 by 504, we get 6 and a remainder of 36.
Use 6 as the next digit of our solution. 
Result so far: 121807.66
Subtract 3024 from 3060 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Our division results in 121807.66 with a remaining 0.036.