We look at the division of 61218037 by 601 
The aim is to understand the frequency of 601 in 61218037.

Advancing to step 1:
6 divided by 601 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 601

Advancing to step 2:
601 can be fit into 61 0 times, resulting in a remainder of 61.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 61 leaves us with 61.
Bring next digit (2) of the dividend behind the 61 and repeat the process: 612 / 601

Moving on to step 3:
601 goes into 612 1 times with a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 601 from 612, we get 11.
Grab the next digit (1) from the dividend, add it to 11, then carry on: 111 / 601

Step 4:
When dividing 111 by 601, we get 0 with a remainder of 111.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we take 0 away from 111, we end up with 111.
Bring next digit (8) of the dividend behind the 111 and repeat the process: 1118 / 601

On to step 5:
When dividing 1118 by 601, we get 1 with a remainder of 517.
The next digit of our result is 1. 
Result so far: 101.0
If we subtract 601 from 1118, we get 517.
Fetch the next digit (0) from the dividend, attach it to 517 and continue: 5170 / 601

Step 6:
The number 601 fits into 5170 8 times, leaving a remainder of 362.
Put 8 as the next digit of the answer. 
Result so far: 1018.0
Deduct 4808 from 5170 and we're left with 362.
Take the next digit (3) from the dividend and append it to 362, then repeat: 3623 / 601

Going ahead to step 7:
When dividing 3623 by 601, we get 6 with a remainder of 17.
The number 6 becomes the next digit in our result. 
Result so far: 10186.0
Deduct 3606 from 3623 and we're left with 17.
Append the next digit (7) from the dividend to 17 and continue with: 177 / 601

Going ahead to step 8:
601 can be fit into 177 0 times, resulting in a remainder of 177.
Put 0 as the next digit of the answer. 
Result so far: 101860.0
Subtracting 0 from 177 leaves us with 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Advancing to step 9:
601 goes into 1770 2 times with a remainder of 568.
Use 2 as the next digit of our solution. 
Result so far: 101860.2
Subtracting 1202 from 1770 leaves us with 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Moving on to step 10:
5680 divided by 601 is 9 with a remainder of 271.
Record the quotient 9 as the next digit in the result. 
Result so far: 101860.29
If we take 5409 away from 5680, we end up with 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

On to step 11:
When dividing 2710 by 601, we get 4 with a remainder of 306.
Record the quotient 4 as the next digit in the result. 
Result so far: 101860.294
Subtracting 2404 from 2710 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.

On to step 12:
601 can be fit into 3060 5 times, resulting in a remainder of 55.
Put 5 as the next digit of the answer. 
Result so far: 101860.2945
If we subtract 3005 from 3060, we get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

On to step 13:
550 divided by 601 is 0 with a remainder of 550.
Write down 0 as next digit of the result. 
Result so far: 101860.2945
Subtracting 0 from 550 leaves us with 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

Moving on to step 14:
601 goes into 5500 9 times with a remainder of 91.
Record the quotient 9 as the next digit in the result. 
Result so far: 101860.294509
If we subtract 5409 from 5500, we get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Going ahead to step 15:
When dividing 910 by 601, we get 1 with a remainder of 309.
The next digit of our result is 1. 
Result so far: 101860.2945091
Subtract 601 from 910 to get 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Advancing to step 16:
If we divide 3090 by 601, we get 5 and a remainder of 85.
Write down 5 as next digit of the result. 
Result so far: 101860.29450915
If we take 3005 away from 3090, we end up with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

After the division, we end up with 101860.29450915 and a remainder of 8.5e-08.