87401821 divided by 346 
The aim is to understand the frequency of 346 in 87401821.

Going ahead to step 1:
8 divided by 346 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 346

Moving on to step 2:
346 goes into 87 0 times with a remainder of 87.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 87 and we're left with 87.
Take the next digit (4) from the dividend and append it to 87, then repeat: 874 / 346

Let's proceed to step 3:
When dividing 874 by 346, we get 2 with a remainder of 182.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 182 after subtracting 692 from 874.
Include the next digit (0) from the dividend after 182, then repeat: 1820 / 346

Going ahead to step 4:
When dividing 1820 by 346, we get 5 with a remainder of 90.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
Subtract 1730 from 1820 to get 90.
Append the next digit (1) from the dividend to 90 and continue with: 901 / 346

On to step 5:
When dividing 901 by 346, we get 2 with a remainder of 209.
Record the quotient 2 as the next digit in the result. 
Result so far: 252.0
Subtracting 692 from 901 leaves us with 209.
Grab the next digit (8) from the dividend, add it to 209, then carry on: 2098 / 346

Going ahead to step 6:
When dividing 2098 by 346, we get 6 with a remainder of 22.
Write down 6 as next digit of the result. 
Result so far: 2526.0
Subtract 2076 from 2098 to get 22.
Include the next digit (2) from the dividend after 22, then repeat: 222 / 346

Step 7:
If we divide 222 by 346, we get 0 and a remainder of 222.
The next digit of our result is 0. 
Result so far: 25260.0
Subtracting 0 from 222 leaves us with 222.
Fetch the next digit (1) from the dividend, attach it to 222 and continue: 2221 / 346

Advancing to step 8:
The number 346 fits into 2221 6 times, leaving a remainder of 145.
Put 6 as the next digit of the answer. 
Result so far: 252606.0
Deduct 2076 from 2221 and we're left with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Moving on to step 9:
346 can be fit into 1450 4 times, resulting in a remainder of 66.
The next digit of our result is 4. 
Result so far: 252606.4
Subtract 1384 from 1450 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

On to step 10:
If we divide 660 by 346, we get 1 and a remainder of 314.
Use 1 as the next digit of our solution. 
Result so far: 252606.41
Subtract 346 from 660 to 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.

Going ahead to step 11:
346 goes into 3140 9 times with a remainder of 26.
Put 9 as the next digit of the answer. 
Result so far: 252606.419
Subtracting 3114 from 3140 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 12:
346 goes into 260 0 times with a remainder of 260.
Record the quotient 0 as the next digit in the result. 
Result so far: 252606.419
Deduct 0 from 260 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Going ahead to step 13:
The number 346 fits into 2600 7 times, leaving a remainder of 178.
Put 7 as the next digit of the answer. 
Result so far: 252606.41907
The remainder is 178 after subtracting 2422 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Let's proceed to step 14:
1780 divided by 346 is 5 with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 252606.419075
If we take 1730 away from 1780, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 15:
346 can be fit into 500 1 times, resulting in a remainder of 154.
Record the quotient 1 as the next digit in the result. 
Result so far: 252606.4190751
The remainder is 154 after subtracting 346 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Moving on to step 16:
When dividing 1540 by 346, we get 4 with a remainder of 156.
The number 4 becomes the next digit in our result. 
Result so far: 252606.41907514
Subtract 1384 from 1540 to get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

The final outcome is 252606.41907514, with a leftover of 1.56e-07.