We're dividing 76137961 by 603 
The aim is to understand the frequency of 603 in 76137961.

Let's proceed to step 1:
If we divide 7 by 603, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 603

Step 2:
If we divide 76 by 603, we get 0 and a remainder of 76.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 76, we end up with 76.
Fetch the next digit (1) from the dividend, attach it to 76 and continue: 761 / 603

Advancing to step 3:
603 goes into 761 1 times with a remainder of 158.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 603 from 761 leaves us with 158.
Fetch the next digit (3) from the dividend, attach it to 158 and continue: 1583 / 603

Going ahead to step 4:
When dividing 1583 by 603, we get 2 with a remainder of 377.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
If we subtract 1206 from 1583, we get 377.
Take the next digit (7) from the dividend and append it to 377, then repeat: 3777 / 603

Advancing to step 5:
603 goes into 3777 6 times with a remainder of 159.
Use 6 as the next digit of our solution. 
Result so far: 126.0
Subtracting 3618 from 3777 leaves us with 159.
Include the next digit (9) from the dividend after 159, then repeat: 1599 / 603

Step 6:
603 can be fit into 1599 2 times, resulting in a remainder of 393.
Write down 2 as next digit of the result. 
Result so far: 1262.0
Subtracting 1206 from 1599 leaves us with 393.
Append the next digit (6) from the dividend to 393 and continue with: 3936 / 603

Step 7:
The number 603 fits into 3936 6 times, leaving a remainder of 318.
The number 6 becomes the next digit in our result. 
Result so far: 12626.0
Subtract 3618 from 3936 to get 318.
Take the next digit (1) from the dividend and append it to 318, then repeat: 3181 / 603

Going ahead to step 8:
The number 603 fits into 3181 5 times, leaving a remainder of 166.
Record the quotient 5 as the next digit in the result. 
Result so far: 126265.0
Subtracting 3015 from 3181 leaves us with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Moving on to step 9:
The number 603 fits into 1660 2 times, leaving a remainder of 454.
Use 2 as the next digit of our solution. 
Result so far: 126265.2
If we subtract 1206 from 1660, we get 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Let's proceed to step 10:
603 can be fit into 4540 7 times, resulting in a remainder of 319.
The number 7 becomes the next digit in our result. 
Result so far: 126265.27
Deduct 4221 from 4540 and we're left with 319.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3190, and continue the process.

Step 11:
603 goes into 3190 5 times with a remainder of 175.
Put 5 as the next digit of the answer. 
Result so far: 126265.275
If we subtract 3015 from 3190, we get 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Step 12:
603 can be fit into 1750 2 times, resulting in a remainder of 544.
Use 2 as the next digit of our solution. 
Result so far: 126265.2752
If we take 1206 away from 1750, we end up with 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

Step 13:
If we divide 5440 by 603, we get 9 and a remainder of 13.
Use 9 as the next digit of our solution. 
Result so far: 126265.27529
If we subtract 5427 from 5440, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 14:
603 can be fit into 130 0 times, resulting in a remainder of 130.
Write down 0 as next digit of the result. 
Result so far: 126265.27529
If we subtract 0 from 130, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Advancing to step 15:
1300 divided by 603 is 2 with a remainder of 94.
The number 2 becomes the next digit in our result. 
Result so far: 126265.2752902
Subtract 1206 from 1300 to get 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Going ahead to step 16:
The number 603 fits into 940 1 times, leaving a remainder of 337.
The number 1 becomes the next digit in our result. 
Result so far: 126265.27529021
Deduct 603 from 940 and we're left with 337.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3370, and continue the process.

Our division results in 126265.27529021 with a remaining 3.37e-07.