53178209 ÷ 351 
The aim is to understand the frequency of 351 in 53178209.

Advancing to step 1:
351 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 351

Step 2:
351 can be fit into 53 0 times, resulting in a remainder of 53.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 53 leaves us with 53.
Grab the next digit (1) from the dividend, add it to 53, then carry on: 531 / 351

On to step 3:
When dividing 531 by 351, we get 1 with a remainder of 180.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 351 from 531 and we're left with 180.
Bring next digit (7) of the dividend behind the 180 and repeat the process: 1807 / 351

Moving on to step 4:
351 goes into 1807 5 times with a remainder of 52.
Write down 5 as next digit of the result. 
Result so far: 15.0
If we subtract 1755 from 1807, we get 52.
Grab the next digit (8) from the dividend, add it to 52, then carry on: 528 / 351

Let's proceed to step 5:
351 goes into 528 1 times with a remainder of 177.
Record the quotient 1 as the next digit in the result. 
Result so far: 151.0
Subtracting 351 from 528 leaves us with 177.
Bring next digit (2) of the dividend behind the 177 and repeat the process: 1772 / 351

Advancing to step 6:
The number 351 fits into 1772 5 times, leaving a remainder of 17.
The number 5 becomes the next digit in our result. 
Result so far: 1515.0
The remainder is 17 after subtracting 1755 from 1772.
Append the next digit (0) from the dividend to 17 and continue with: 170 / 351

Let's proceed to step 7:
If we divide 170 by 351, we get 0 and a remainder of 170.
The next digit of our result is 0. 
Result so far: 15150.0
Subtracting 0 from 170 leaves us with 170.
Take the next digit (9) from the dividend and append it to 170, then repeat: 1709 / 351

Advancing to step 8:
When dividing 1709 by 351, we get 4 with a remainder of 305.
Use 4 as the next digit of our solution. 
Result so far: 151504.0
Deduct 1404 from 1709 and we're left with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Step 9:
If we divide 3050 by 351, we get 8 and a remainder of 242.
Put 8 as the next digit of the answer. 
Result so far: 151504.8
Subtracting 2808 from 3050 leaves us with 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

Step 10:
If we divide 2420 by 351, we get 6 and a remainder of 314.
The next digit of our result is 6. 
Result so far: 151504.86
Subtracting 2106 from 2420 leaves us with 314.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Going ahead to step 11:
The number 351 fits into 3140 8 times, leaving a remainder of 332.
Write down 8 as next digit of the result. 
Result so far: 151504.868
If we subtract 2808 from 3140, we get 332.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

Let's proceed to step 12:
If we divide 3320 by 351, we get 9 and a remainder of 161.
Use 9 as the next digit of our solution. 
Result so far: 151504.8689
If we take 3159 away from 3320, we end up with 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

Going ahead to step 13:
If we divide 1610 by 351, we get 4 and a remainder of 206.
Write down 4 as next digit of the result. 
Result so far: 151504.86894
If we subtract 1404 from 1610, we get 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Advancing to step 14:
351 can be fit into 2060 5 times, resulting in a remainder of 305.
Put 5 as the next digit of the answer. 
Result so far: 151504.868945
The remainder is 305 after subtracting 1755 from 2060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Let's proceed to step 15:
351 can be fit into 3050 8 times, resulting in a remainder of 242.
Use 8 as the next digit of our solution. 
Result so far: 151504.8689458
If we subtract 2808 from 3050, we get 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

Going ahead to step 16:
351 can be fit into 2420 6 times, resulting in a remainder of 314.
Write down 6 as next digit of the result. 
Result so far: 151504.86894586
If we subtract 2106 from 2420, we get 314.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

The final outcome is 151504.86894586, with a leftover of 3.14e-07.